diff --git a/Cargo.toml b/Cargo.toml
index ce79fb9..29de197 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -66,6 +66,5 @@ cgmath = "0.18.0"
 rand = "0.8.5"
 walkdir = "2.4.0"
 toml = "0.8.8"
-
 # Glyphon's crates.io release doesn't support wgpu 0.18 yet
 glyphon = { git = "https://github.com/grovesNL/glyphon.git", branch = "main" }
diff --git a/assets b/assets
index 1674e86..9746acb 160000
--- a/assets
+++ b/assets
@@ -1 +1 @@
-Subproject commit 1674e86c1edcbd119d94516950d2d274b46a19d4
+Subproject commit 9746acb16c6e2c5f6f232e8d1b53e27fb9ef486e
diff --git a/content/config.toml b/content/config.toml
new file mode 100644
index 0000000..07c8988
--- /dev/null
+++ b/content/config.toml
@@ -0,0 +1,38 @@
+[config]
+# Per-game config values.
+# These should rarely be changed.
+
+sprite_root = "render"
+
+fonts.files = [
+	"fonts/PTAstraSans-Bold.ttf",
+	"fonts/PTAstraSans-BoldItalic.ttf",
+	"fonts/PTAstraSans-Italic.ttf",
+	"fonts/PTAstraSans-Regular.ttf",
+	"fonts/PTAstraSerif-Bold.ttf",
+	"fonts/PTAstraSerif-BoldItalic.ttf",
+	"fonts/PTAstraSerif-Italic.ttf",
+	"fonts/PTAstraSerif-Regular.ttf",
+	"fonts/PTMono-Regular.ttf",
+]
+
+fonts.serif = "PT Astra Serif"
+fonts.sans = "PT Astra Sans"
+fonts.mono = "PT Mono"
+
+# Size range for starfield stars, in game units.
+# This is scaled for zoom, but NOT for distance.
+starfield.min_size = 0.2
+starfield.max_size = 1.8
+
+# Z-axis (parallax) range for starfield stars
+starfield.min_dist = 75.0
+starfield.max_dist = 200.0
+# Name of starfield sprite
+starfield.sprite = "starfield"
+
+
+# Zoom level bounds.
+# Zoom is measured as "window height in game units."
+zoom_min = 200.0
+zoom_max = 2000.0
diff --git a/crates/content/src/lib.rs b/crates/content/src/lib.rs
index 4d63f2b..33a5fe8 100644
--- a/crates/content/src/lib.rs
+++ b/crates/content/src/lib.rs
@@ -7,7 +7,7 @@ mod handle;
 mod part;
 mod util;
 
-use anyhow::{Context, Result};
+use anyhow::{bail, Context, Result};
 use galactica_packer::{SpriteAtlas, SpriteAtlasImage};
 use std::{
 	collections::HashMap,
@@ -28,7 +28,10 @@ mod syntax {
 	use serde::Deserialize;
 	use std::{collections::HashMap, fmt::Display, hash::Hash};
 
-	use crate::part::{effect, faction, outfit, ship, sprite, system};
+	use crate::{
+		config,
+		part::{effect, faction, outfit, ship, sprite, system},
+	};
 
 	#[derive(Debug, Deserialize)]
 	pub struct Root {
@@ -38,6 +41,7 @@ mod syntax {
 		pub sprite: Option<HashMap<String, sprite::syntax::Sprite>>,
 		pub faction: Option<HashMap<String, faction::syntax::Faction>>,
 		pub effect: Option<HashMap<String, effect::syntax::Effect>>,
+		pub config: Option<config::syntax::Config>,
 	}
 
 	fn merge_hashmap<K, V>(
@@ -74,6 +78,7 @@ mod syntax {
 				sprite: None,
 				faction: None,
 				effect: None,
+				config: None,
 			}
 		}
 
@@ -89,6 +94,13 @@ mod syntax {
 				.with_context(|| "while merging factions")?;
 			merge_hashmap(&mut self.effect, other.effect)
 				.with_context(|| "while merging effects")?;
+			if self.config.is_some() {
+				if other.config.is_some() {
+					bail!("invalid content dir, multiple config tables")
+				}
+			} else {
+				self.config = other.config;
+			}
 			return Ok(());
 		}
 	}
@@ -124,12 +136,6 @@ impl ContentBuildContext {
 /// Represents static game content
 #[derive(Debug)]
 pub struct Content {
-	/* Configuration values */
-	/// Root directory for image
-	image_root: PathBuf,
-	/// Name of starfield sprite
-	starfield_sprite_name: String,
-
 	/// Sprites
 	pub sprites: Vec<Sprite>,
 	/// Map strings to texture names.
@@ -147,6 +153,7 @@ pub struct Content {
 	systems: Vec<System>,
 	factions: Vec<Faction>,
 	effects: Vec<Effect>,
+	config: Config,
 }
 
 // Loading methods
@@ -159,12 +166,7 @@ impl Content {
 	}
 
 	/// Load content from a directory.
-	pub fn load_dir(
-		path: PathBuf,
-		texture_root: PathBuf,
-		atlas_index: PathBuf,
-		starfield_texture_name: String,
-	) -> Result<Self> {
+	pub fn load_dir(path: PathBuf, asset_root: PathBuf, atlas_index: PathBuf) -> Result<Self> {
 		let mut root = syntax::Root::new();
 
 		for e in WalkDir::new(path).into_iter().filter_map(|e| e.ok()) {
@@ -202,6 +204,15 @@ impl Content {
 		let mut build_context = ContentBuildContext::new();
 
 		let mut content = Self {
+			config: {
+				if let Some(c) = root.config {
+					c.build(&asset_root)
+						.with_context(|| "while parsing config table")?
+				} else {
+					bail!("failed loading content: no config table specified")
+				}
+			},
+
 			sprite_atlas: atlas,
 			systems: Vec::new(),
 			ships: Vec::new(),
@@ -212,8 +223,6 @@ impl Content {
 			effects: Vec::new(),
 			sprite_index: HashMap::new(),
 			starfield_handle: None,
-			image_root: texture_root,
-			starfield_sprite_name: starfield_texture_name,
 		};
 
 		// TODO: enforce sprite and image limits
@@ -333,4 +342,9 @@ impl Content {
 	pub fn get_effect(&self, h: EffectHandle) -> &Effect {
 		return &self.effects[h.index];
 	}
+
+	/// Get content configuration
+	pub fn get_config(&self) -> &Config {
+		return &self.config;
+	}
 }
diff --git a/crates/content/src/part/config.rs b/crates/content/src/part/config.rs
new file mode 100644
index 0000000..dc035a8
--- /dev/null
+++ b/crates/content/src/part/config.rs
@@ -0,0 +1,145 @@
+use std::path::PathBuf;
+
+pub(crate) mod syntax {
+	use anyhow::{bail, Result};
+	use serde::Deserialize;
+	use std::path::{Path, PathBuf};
+
+	// Raw serde syntax structs.
+	// These are never seen by code outside this crate.
+
+	#[derive(Debug, Deserialize)]
+	pub struct Config {
+		pub fonts: Fonts,
+		pub sprite_root: PathBuf,
+		pub starfield: Starfield,
+		pub zoom_min: f32,
+		pub zoom_max: f32,
+	}
+
+	impl Config {
+		// TODO: clean up build trait
+		pub fn build(self, asset_root: &Path) -> Result<super::Config> {
+			for i in &self.fonts.files {
+				if !asset_root.join(i).exists() {
+					bail!("font file `{}` doesn't exist", i.display());
+				}
+			}
+
+			let starfield_density = 0.01;
+			let starfield_size = self.starfield.min_dist * self.zoom_max;
+			let starfield_count = (starfield_size * starfield_density) as i32;
+
+			// 12, because that should be enough to tile any screen.
+			// Starfield squares are tiled to cover the viewport, adapting to any screen ratio.
+			// An insufficient limit will result in some tiles not being drawn
+			let starfield_instance_limit = 12 * starfield_count as u64;
+
+			return Ok(super::Config {
+				sprite_root: asset_root.join(self.sprite_root),
+				font_files: self
+					.fonts
+					.files
+					.iter()
+					.map(|i| asset_root.join(i))
+					.collect(),
+
+				font_sans: self.fonts.sans,
+				font_serif: self.fonts.serif,
+				font_mono: self.fonts.mono,
+				//font_cursive: self.fonts.cursive,
+				//font_fantasy: self.fonts.fantasy,
+				starfield_max_dist: self.starfield.max_dist,
+				starfield_min_dist: self.starfield.min_dist,
+				starfield_max_size: self.starfield.max_size,
+				starfield_min_size: self.starfield.min_size,
+				starfield_sprite: self.starfield.sprite,
+				starfield_count,
+				starfield_density,
+				starfield_size,
+				starfield_instance_limit,
+				zoom_max: self.zoom_max,
+				zoom_min: self.zoom_min,
+			});
+		}
+	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct Fonts {
+		pub files: Vec<PathBuf>,
+		pub sans: String,
+		pub serif: String,
+		pub mono: String,
+		//pub cursive: String,
+		//pub fantasy: String,
+	}
+
+	#[derive(Debug, Deserialize)]
+	pub struct Starfield {
+		pub min_size: f32,
+		pub max_size: f32,
+		pub min_dist: f32,
+		pub max_dist: f32,
+		pub sprite: String,
+	}
+}
+
+/// Content configuration
+#[derive(Debug, Clone)]
+pub struct Config {
+	/// The directory where all images are stored.
+	/// Image paths are always interpreted relative to this path.
+	/// This is a subdirectory of the asset root.
+	pub sprite_root: PathBuf,
+
+	/// List of font files to load
+	pub font_files: Vec<PathBuf>,
+
+	/// Sans Serif font family name
+	pub font_sans: String,
+
+	/// Serif font family name
+	pub font_serif: String,
+
+	/// Monospace font family name
+	pub font_mono: String,
+	//pub font_cursive: String,
+	//pub font_fantasy: String,
+	/// Min size of starfield sprite, in game units
+	pub starfield_min_size: f32,
+
+	/// Max size of starfield sprite, in game units
+	pub starfield_max_size: f32,
+
+	/// Minimum z-distance of starfield star, in game units
+	pub starfield_min_dist: f32,
+
+	/// Maximum z-distance of starfield star, in game units
+	pub starfield_max_dist: f32,
+
+	/// Name of starfield sprite
+	pub starfield_sprite: String,
+
+	/// Size of a square starfield tile, in game units.
+	/// A tile of size STARFIELD_Z_MAX * screen-size-in-game-units
+	/// will completely cover a (square) screen.
+	/// This should be big enough to cover the height of the screen at max zoom.
+	pub starfield_size: f32,
+
+	/// Average number of stars per game unit
+	pub starfield_density: f32,
+
+	/// Number of stars in one starfield tile
+	/// Must be positive
+	pub starfield_count: i32,
+
+	// TODO: this shouldn't be here, it depends on graphics implementation
+	/// The maximum number of starfield sprites we can create
+	pub starfield_instance_limit: u64,
+
+	/// Minimum zoom, in game units
+	pub zoom_min: f32,
+
+	/// Maximum zoom,in game units
+	pub zoom_max: f32,
+}
diff --git a/crates/content/src/part/mod.rs b/crates/content/src/part/mod.rs
index 5d6d21a..48e50d7 100644
--- a/crates/content/src/part/mod.rs
+++ b/crates/content/src/part/mod.rs
@@ -1,5 +1,6 @@
 //! Content parts
 
+pub(crate) mod config;
 pub(crate) mod effect;
 pub(crate) mod faction;
 pub(crate) mod outfit;
@@ -8,6 +9,7 @@ pub(crate) mod ship;
 pub(crate) mod sprite;
 pub(crate) mod system;
 
+pub use config::Config;
 pub use effect::Effect;
 pub use faction::{Faction, Relationship};
 pub use outfit::{Gun, Outfit, Projectile, ProjectileCollider};
diff --git a/crates/content/src/part/sprite.rs b/crates/content/src/part/sprite.rs
index 9bb788c..b6f1c73 100644
--- a/crates/content/src/part/sprite.rs
+++ b/crates/content/src/part/sprite.rs
@@ -120,7 +120,7 @@ impl crate::Build for Sprite {
 		for (sprite_name, t) in sprites {
 			match t {
 				syntax::Sprite::Static(t) => {
-					let file = content.image_root.join(&t.file);
+					let file = content.config.sprite_root.join(&t.file);
 					let reader = Reader::open(&file).with_context(|| {
 						format!(
 							"Failed to read file `{}` in sprite `{}`",
@@ -141,7 +141,7 @@ impl crate::Build for Sprite {
 						aspect: dim.0 as f32 / dim.1 as f32,
 					};
 
-					if sprite_name == content.starfield_sprite_name {
+					if sprite_name == content.config.starfield_sprite {
 						if content.starfield_handle.is_none() {
 							content.starfield_handle = Some(h)
 						} else {
@@ -166,7 +166,7 @@ impl crate::Build for Sprite {
 				syntax::Sprite::Frames(t) => {
 					let mut dim = None;
 					for f in &t.frames {
-						let file = content.image_root.join(f);
+						let file = content.config.sprite_root.join(f);
 						let reader = Reader::open(&file).with_context(|| {
 							format!(
 								"Failed to read file `{}` in sprite `{}`",
@@ -200,7 +200,7 @@ impl crate::Build for Sprite {
 						aspect: dim.0 as f32 / dim.1 as f32,
 					};
 
-					if sprite_name == content.starfield_sprite_name {
+					if sprite_name == content.config.starfield_sprite {
 						unreachable!("Starfield texture may not be animated")
 					}
 
@@ -227,7 +227,7 @@ impl crate::Build for Sprite {
 		if content.starfield_handle.is_none() {
 			bail!(
 				"Could not find a starfield texture (name: `{}`)",
-				content.starfield_sprite_name
+				content.config.starfield_sprite
 			)
 		}
 
diff --git a/crates/galactica/src/game.rs b/crates/galactica/src/game.rs
index 1548f30..b914a01 100644
--- a/crates/galactica/src/game.rs
+++ b/crates/galactica/src/game.rs
@@ -1,9 +1,6 @@
 use galactica_content::{Content, FactionHandle, OutfitHandle, ShipHandle, SystemHandle};
 use galactica_galaxy::{ship::ShipPersonality, Galaxy, GxShipHandle};
-use galactica_util::{
-	constants::{ZOOM_MAX, ZOOM_MIN},
-	timing::Timing,
-};
+use galactica_util::timing::Timing;
 use std::time::Instant;
 use winit::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, VirtualKeyCode};
 
@@ -21,8 +18,9 @@ pub struct Game {
 	start_instant: Instant,
 	camera: Camera,
 
-	galaxy: Galaxy,
-	content: Content,
+	ct: Content,
+	gx: Galaxy,
+
 	systemsim: SystemSim,
 
 	new_particles: Vec<ParticleBuilder>,
@@ -86,8 +84,8 @@ impl Game {
 			paused: false,
 			time_scale: 1.0,
 			systemsim: physics,
-			galaxy,
-			content: ct,
+			gx: galaxy,
+			ct,
 			new_particles: Vec::new(),
 			timing: Timing::new(),
 		}
@@ -123,7 +121,7 @@ impl Game {
 
 		self.timing.start_frame();
 		self.timing.start_galaxy();
-		self.galaxy.step(t);
+		self.gx.step(t);
 		self.timing.mark_galaxy();
 
 		self.systemsim.step(StepResources {
@@ -134,15 +132,16 @@ impl Game {
 				thrust: self.input.key_thrust,
 				guns: self.input.key_guns,
 			},
-			ct: &self.content,
-			gx: &mut self.galaxy,
+			ct: &self.ct,
+			gx: &mut self.gx,
 			particles: &mut self.new_particles,
 			timing: &mut self.timing,
 			t,
 		});
 
 		if self.input.v_scroll != 0.0 {
-			self.camera.zoom = (self.camera.zoom + self.input.v_scroll).clamp(ZOOM_MIN, ZOOM_MAX);
+			self.camera.zoom = (self.camera.zoom + self.input.v_scroll)
+				.clamp(self.ct.get_config().zoom_min, self.ct.get_config().zoom_max);
 			self.input.v_scroll = 0.0;
 		}
 
@@ -161,13 +160,17 @@ impl Game {
 			camera_pos: self.camera.pos,
 			camera_zoom: self.camera.zoom,
 			current_time: self.start_instant.elapsed().as_secs_f32(),
-			content: &self.content,
+			ct: &self.ct,
 			systemsim: &self.systemsim, // TODO: maybe system should be stored here?
 			particles: &mut self.new_particles,
 			player_data: self.player,
-			data: &self.galaxy,
+			gx: &self.gx,
 			current_system: SystemHandle { index: 0 },
 			timing: &mut self.timing,
 		}
 	}
+
+	pub fn get_content(&self) -> &Content {
+		&self.ct
+	}
 }
diff --git a/crates/galactica/src/main.rs b/crates/galactica/src/main.rs
index 22ba264..5010e2f 100644
--- a/crates/galactica/src/main.rs
+++ b/crates/galactica/src/main.rs
@@ -4,7 +4,7 @@ mod inputstatus;
 
 use anyhow::{bail, Result};
 use galactica_content::Content;
-use galactica_util::constants::{ASSET_CACHE, CONTENT_ROOT, IMAGE_ROOT, STARFIELD_SPRITE_NAME};
+use galactica_util::constants::ASSET_CACHE;
 use std::{
 	fs,
 	path::{Path, PathBuf},
@@ -27,19 +27,17 @@ fn main() -> Result<()> {
 
 	// TODO: pretty error if missing
 	let content = Content::load_dir(
-		PathBuf::from(CONTENT_ROOT),
-		PathBuf::from(IMAGE_ROOT),
+		PathBuf::from("./content"),
+		PathBuf::from("./assets"),
 		atlas_index,
-		STARFIELD_SPRITE_NAME.to_owned(),
 	)?;
 
 	let event_loop = EventLoop::new();
 	let window = WindowBuilder::new().build(&event_loop).unwrap();
 	let mut gpu = pollster::block_on(galactica_render::GPUState::new(window, &content))?;
-	gpu.init();
+	gpu.init(&content);
 
 	let mut game = game::Game::new(content);
-	gpu.update_starfield_buffer();
 	game.set_camera_aspect(
 		gpu.window().inner_size().width as f32 / gpu.window().inner_size().height as f32,
 	);
@@ -49,7 +47,7 @@ fn main() -> Result<()> {
 			Event::RedrawRequested(window_id) if window_id == gpu.window().id() => {
 				match gpu.render(game.get_frame_state()) {
 					Ok(_) => {}
-					Err(wgpu::SurfaceError::Lost) => gpu.resize(),
+					Err(wgpu::SurfaceError::Lost) => gpu.resize(game.get_content()),
 					Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
 					// All other errors (Outdated, Timeout) should be resolved by the next frame
 					Err(e) => eprintln!("{:?}", e),
@@ -85,14 +83,14 @@ fn main() -> Result<()> {
 					game.process_scroll(delta, phase);
 				}
 				WindowEvent::Resized(_) => {
-					gpu.resize();
+					gpu.resize(game.get_content());
 					game.set_camera_aspect(
 						gpu.window().inner_size().width as f32
 							/ gpu.window().inner_size().height as f32,
 					);
 				}
 				WindowEvent::ScaleFactorChanged { .. } => {
-					gpu.resize();
+					gpu.resize(game.get_content());
 					game.set_camera_aspect(
 						gpu.window().inner_size().width as f32
 							/ gpu.window().inner_size().height as f32,
diff --git a/crates/render/src/datastructs.rs b/crates/render/src/datastructs.rs
index ceab9b2..7fd4cae 100644
--- a/crates/render/src/datastructs.rs
+++ b/crates/render/src/datastructs.rs
@@ -32,10 +32,10 @@ pub struct RenderInput<'a> {
 	pub current_time: f32,
 
 	/// Game content
-	pub content: &'a Content,
+	pub ct: &'a Content,
 
 	/// Game data
-	pub data: &'a Galaxy,
+	pub gx: &'a Galaxy,
 
 	/// Particles to spawn during this frame
 	pub particles: &'a mut Vec<ParticleBuilder>,
diff --git a/crates/render/src/gpustate/mod.rs b/crates/render/src/gpustate/mod.rs
index c77846e..0d15940 100644
--- a/crates/render/src/gpustate/mod.rs
+++ b/crates/render/src/gpustate/mod.rs
@@ -1,4 +1,5 @@
 use bytemuck;
+use galactica_content::Content;
 use wgpu;
 use winit;
 
@@ -40,7 +41,7 @@ impl GPUState {
 
 	/// Update window size.
 	/// This should be called whenever our window is resized.
-	pub fn resize(&mut self) {
+	pub fn resize(&mut self, ct: &Content) {
 		let new_size = self.state.window.inner_size();
 		if new_size.width > 0 && new_size.height > 0 {
 			self.state.window_size = new_size;
@@ -49,23 +50,11 @@ impl GPUState {
 			self.config.height = new_size.height;
 			self.surface.configure(&self.device, &self.config);
 		}
-		self.update_starfield_buffer()
-	}
-
-	/// Make a StarfieldInstance for each star that needs to be drawn.
-	/// Will panic if STARFIELD_INSTANCE_LIMIT is exceeded.
-	///
-	/// Starfield data rarely changes, so this is called only when it's needed.
-	pub fn update_starfield_buffer(&mut self) {
-		self.state.queue.write_buffer(
-			&self.state.vertex_buffers.starfield.instances,
-			0,
-			bytemuck::cast_slice(&self.starfield.make_instances(self.state.window_aspect)),
-		);
+		self.starfield.update_buffer(ct, &mut self.state);
 	}
 
 	/// Initialize the rendering engine
-	pub fn init(&mut self) {
+	pub fn init(&mut self, ct: &Content) {
 		// Update global values
 		self.state.queue.write_buffer(
 			&self.state.global_uniform.atlas_buffer,
@@ -78,6 +67,6 @@ impl GPUState {
 			bytemuck::cast_slice(&[self.texture_array.sprite_data]),
 		);
 
-		self.update_starfield_buffer();
+		self.starfield.update_buffer(ct, &mut self.state);
 	}
 }
diff --git a/crates/render/src/gpustate/new.rs b/crates/render/src/gpustate/new.rs
index 64adb17..ee20deb 100644
--- a/crates/render/src/gpustate/new.rs
+++ b/crates/render/src/gpustate/new.rs
@@ -1,8 +1,7 @@
 use anyhow::Result;
 use galactica_content::Content;
 use galactica_util::constants::{
-	OBJECT_SPRITE_INSTANCE_LIMIT, PARTICLE_SPRITE_INSTANCE_LIMIT, STARFIELD_SPRITE_INSTANCE_LIMIT,
-	UI_SPRITE_INSTANCE_LIMIT,
+	OBJECT_SPRITE_INSTANCE_LIMIT, PARTICLE_SPRITE_INSTANCE_LIMIT, UI_SPRITE_INSTANCE_LIMIT,
 };
 use glyphon::{FontSystem, SwashCache, TextAtlas, TextRenderer};
 use std::rc::Rc;
@@ -110,7 +109,7 @@ impl GPUState {
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
-				STARFIELD_SPRITE_INSTANCE_LIMIT,
+				ct.get_config().starfield_instance_limit,
 			)),
 
 			ui: Rc::new(VertexBuffer::new::<TexturedVertex, UiInstance>(
@@ -150,7 +149,32 @@ impl GPUState {
 
 		// Text renderer
 		let mut text_atlas = TextAtlas::new(&device, &queue, wgpu::TextureFormat::Bgra8UnormSrgb);
-		let text_font_system = FontSystem::new();
+		let mut text_font_system = FontSystem::new_with_locale_and_db(
+			"en-US".to_string(),
+			glyphon::fontdb::Database::new(),
+		);
+
+		let conf = ct.get_config();
+		for font in &conf.font_files {
+			text_font_system.db_mut().load_font_file(font)?;
+		}
+
+		// TODO: nice error if no family with this name is found
+		text_font_system
+			.db_mut()
+			.set_sans_serif_family(conf.font_sans.clone());
+		text_font_system
+			.db_mut()
+			.set_serif_family(conf.font_serif.clone());
+		text_font_system
+			.db_mut()
+			.set_monospace_family(conf.font_mono.clone());
+		//text_font_system
+		//	.db_mut()
+		//	.set_cursive_family(conf.font_cursive.clone());
+		//text_font_system
+		//	.db_mut()
+		//	.set_fantasy_family(conf.font_fantasy.clone());
 
 		let text_cache = SwashCache::new();
 		let text_renderer = TextRenderer::new(
@@ -238,7 +262,7 @@ impl GPUState {
 			.build();
 
 		let mut starfield = Starfield::new();
-		starfield.regenerate();
+		starfield.regenerate(ct);
 
 		let mut state = RenderState {
 			queue,
diff --git a/crates/render/src/gpustate/render.rs b/crates/render/src/gpustate/render.rs
index 4fbcfbc..256a239 100644
--- a/crates/render/src/gpustate/render.rs
+++ b/crates/render/src/gpustate/render.rs
@@ -1,10 +1,7 @@
 use anyhow::Result;
 use bytemuck;
 use cgmath::Point2;
-use galactica_util::constants::{
-	PARTICLE_SPRITE_INSTANCE_LIMIT, STARFIELD_SIZE, STARFIELD_SIZE_MAX, STARFIELD_SIZE_MIN,
-	ZOOM_MAX, ZOOM_MIN,
-};
+use galactica_util::constants::PARTICLE_SPRITE_INSTANCE_LIMIT;
 use glyphon::Resolution;
 use rand::seq::SliceRandom;
 use std::iter;
@@ -56,7 +53,7 @@ impl super::GPUState {
 		self.state.vertex_buffers.radialbar_counter = 0;
 		// Don't reset particle counter, it's special
 
-		let s = input.content.get_starfield_handle();
+		let s = input.ct.get_starfield_handle();
 
 		// Update global values
 		self.state.queue.write_buffer(
@@ -65,7 +62,10 @@ impl super::GPUState {
 			bytemuck::cast_slice(&[GlobalDataContent {
 				camera_position: input.camera_pos.into(),
 				camera_zoom: [input.camera_zoom, 0.0],
-				camera_zoom_limits: [ZOOM_MIN, ZOOM_MAX],
+				camera_zoom_limits: [
+					input.ct.get_config().zoom_min,
+					input.ct.get_config().zoom_max,
+				],
 				window_size: [
 					self.state.window_size.width as f32,
 					self.state.window_size.height as f32,
@@ -73,8 +73,11 @@ impl super::GPUState {
 				window_scale: [self.state.window.scale_factor() as f32, 0.0],
 				window_aspect: [self.state.window_aspect, 0.0],
 				starfield_sprite: [s.get_index(), 0],
-				starfield_tile_size: [STARFIELD_SIZE as f32, 0.0],
-				starfield_size_limits: [STARFIELD_SIZE_MIN, STARFIELD_SIZE_MAX],
+				starfield_tile_size: [input.ct.get_config().starfield_size, 0.0],
+				starfield_size_limits: [
+					input.ct.get_config().starfield_min_size,
+					input.ct.get_config().starfield_max_size,
+				],
 				current_time: [input.current_time, 0.0],
 			}]),
 		);
diff --git a/crates/render/src/gpustate/systemsim.rs b/crates/render/src/gpustate/systemsim.rs
index 97e94d0..a9b9cfa 100644
--- a/crates/render/src/gpustate/systemsim.rs
+++ b/crates/render/src/gpustate/systemsim.rs
@@ -23,7 +23,7 @@ impl GPUState {
 			let ship_pos = util::rigidbody_position(&r);
 			let ship_rot = util::rigidbody_rotation(r);
 			let ship_ang = -ship_rot.angle(Vector2 { x: 0.0, y: 1.0 }); // TODO: inconsistent angles. Fix!
-			let ship_cnt = state.content.get_ship(s.data_handle.content_handle());
+			let ship_cnt = state.ct.get_ship(s.data_handle.content_handle());
 
 			// Position adjusted for parallax
 			// TODO: adjust parallax for zoom?
@@ -83,12 +83,12 @@ impl GPUState {
 			// This will be None if this ship is dead.
 			// (physics object stays around to complete the death animation)
 			// If that is the case, we're done, no flares to draw anyway!
-			let ship = match state.data.get_ship(s.data_handle) {
+			let ship = match state.gx.get_ship(s.data_handle) {
 				None => continue,
 				Some(s) => s,
 			};
 
-			let flare = ship.get_outfits().get_flare_sprite(state.content);
+			let flare = ship.get_outfits().get_flare_sprite(state.ct);
 			if s.get_controls().thrust && flare.is_some() {
 				for engine_point in &ship_cnt.engines {
 					self.state.queue.write_buffer(
@@ -204,7 +204,7 @@ impl GPUState {
 		// NE and SW corners of screen
 		screen_clip: (Point2<f32>, Point2<f32>),
 	) {
-		let system = state.content.get_system(state.current_system);
+		let system = state.ct.get_system(state.current_system);
 
 		for o in &system.objects {
 			// Position adjusted for parallax
diff --git a/crates/render/src/starfield.rs b/crates/render/src/starfield.rs
index 6ae7c7d..a5178e9 100644
--- a/crates/render/src/starfield.rs
+++ b/crates/render/src/starfield.rs
@@ -1,11 +1,11 @@
 use cgmath::{Point2, Point3, Vector2, Vector3};
-use galactica_util::constants::{
-	STARFIELD_COUNT, STARFIELD_SIZE, STARFIELD_SIZE_MAX, STARFIELD_SIZE_MIN,
-	STARFIELD_SPRITE_INSTANCE_LIMIT, STARFIELD_Z_MAX, STARFIELD_Z_MIN, ZOOM_MAX,
-};
+use galactica_content::Content;
 use rand::{self, Rng};
 
-use crate::vertexbuffer::types::StarfieldInstance;
+use crate::{
+	datastructs::RenderState,
+	vertexbuffer::{types::StarfieldInstance, BufferObject},
+};
 
 pub(crate) struct StarfieldStar {
 	/// Star coordinates, in world space.
@@ -30,22 +30,26 @@ impl Starfield {
 	pub fn new() -> Self {
 		Self {
 			stars: Vec::new(),
-			instance_count: 0u32,
+			instance_count: 0,
 		}
 	}
 
-	pub fn regenerate(&mut self) {
+	pub fn regenerate(&mut self, ct: &Content) {
 		// TODO: save seed in system, regenerate on jump
 		let mut rng = rand::thread_rng();
-		let sz = STARFIELD_SIZE as f32 / 2.0;
-		self.stars = (0..STARFIELD_COUNT)
+		let sz = ct.get_config().starfield_size as f32 / 2.0;
+		self.stars = (0..ct.get_config().starfield_count)
 			.map(|_| StarfieldStar {
 				pos: Point3 {
 					x: rng.gen_range(-sz..=sz),
 					y: rng.gen_range(-sz..=sz),
-					z: rng.gen_range(STARFIELD_Z_MIN..STARFIELD_Z_MAX),
+					z: rng.gen_range(
+						ct.get_config().starfield_min_dist..=ct.get_config().starfield_max_dist,
+					),
 				},
-				size: rng.gen_range(STARFIELD_SIZE_MIN..STARFIELD_SIZE_MAX),
+				size: rng.gen_range(
+					ct.get_config().starfield_min_size..ct.get_config().starfield_max_size,
+				),
 				tint: Vector2 {
 					x: rng.gen_range(0.0..=1.0),
 					y: rng.gen_range(0.0..=1.0),
@@ -54,18 +58,18 @@ impl Starfield {
 			.collect();
 	}
 
-	pub fn make_instances(&mut self, aspect: f32) -> Vec<StarfieldInstance> {
-		let sz = STARFIELD_SIZE as f32;
+	pub fn update_buffer(&mut self, ct: &Content, state: &mut RenderState) {
+		let sz = ct.get_config().starfield_size as f32;
 
 		// Compute window size in starfield tiles
 		let mut nw_tile: Point2<i32> = {
 			// Game coordinates (relative to camera) of nw corner of screen.
-			let clip_nw = Point2::from((aspect, 1.0)) * ZOOM_MAX;
+			let clip_nw = Point2::from((state.window_aspect, 1.0)) * ct.get_config().zoom_max;
 
 			// Parallax correction.
 			// Also, adjust v for mod to work properly
 			// (v is centered at 0)
-			let v: Point2<f32> = clip_nw * STARFIELD_Z_MIN;
+			let v: Point2<f32> = clip_nw * ct.get_config().starfield_min_dist;
 			let v_adj: Point2<f32> = (v.x + (sz / 2.0), v.y + (sz / 2.0)).into();
 
 			#[rustfmt::skip]
@@ -89,14 +93,14 @@ impl Starfield {
 
 		// Truncate tile grid to buffer size
 		// (The window won't be full of stars if our instance limit is too small)
-		while ((nw_tile.x * 2 + 1) * (nw_tile.y * 2 + 1) * STARFIELD_COUNT as i32)
-			> STARFIELD_SPRITE_INSTANCE_LIMIT as i32
+		while ((nw_tile.x * 2 + 1) * (nw_tile.y * 2 + 1) * ct.get_config().starfield_count as i32)
+			> ct.get_config().starfield_instance_limit as i32
 		{
 			nw_tile -= Vector2::from((1, 1));
 		}
 
 		// Add all tiles to buffer
-		let mut instances = Vec::new();
+		self.instance_count = 0; // Keep track of buffer index
 		for x in (-nw_tile.x)..=nw_tile.x {
 			for y in (-nw_tile.y)..=nw_tile.y {
 				let offset = Vector3 {
@@ -105,21 +109,21 @@ impl Starfield {
 					z: 0.0,
 				};
 				for s in &self.stars {
-					instances.push(StarfieldInstance {
-						position: (s.pos + offset).into(),
-						size: s.size,
-						tint: s.tint.into(),
-					})
+					state.queue.write_buffer(
+						&state.vertex_buffers.starfield.instances,
+						StarfieldInstance::SIZE * self.instance_count as u64,
+						bytemuck::cast_slice(&[StarfieldInstance {
+							position: (s.pos + offset).into(),
+							size: s.size,
+							tint: s.tint.into(),
+						}]),
+					);
+					self.instance_count += 1;
+
+					// instance_count is guaranteed to stay within buffer limits,
+					// this is guaranteed by previous checks.
 				}
 			}
 		}
-
-		// Enforce starfield limit
-		if instances.len() as u64 > STARFIELD_SPRITE_INSTANCE_LIMIT {
-			unreachable!("Starfield limit exceeded!")
-		}
-		self.instance_count = instances.len() as u32;
-
-		return instances;
 	}
 }
diff --git a/crates/render/src/ui/fpsindicator.rs b/crates/render/src/ui/fpsindicator.rs
index 5b7aeb3..69f9f8a 100644
--- a/crates/render/src/ui/fpsindicator.rs
+++ b/crates/render/src/ui/fpsindicator.rs
@@ -9,7 +9,7 @@ pub(super) struct FpsIndicator {
 
 impl FpsIndicator {
 	pub fn new(state: &mut RenderState) -> Self {
-		let mut buffer = Buffer::new(&mut state.text_font_system, Metrics::new(12.0, 20.0));
+		let mut buffer = Buffer::new(&mut state.text_font_system, Metrics::new(15.0, 20.0));
 		buffer.set_size(
 			&mut state.text_font_system,
 			state.window_size.width as f32,
@@ -36,7 +36,7 @@ impl FpsIndicator {
 		self.buffer.set_text(
 			&mut state.text_font_system,
 			&format!(
-				"Frame:  {:04.02?}%\nGame:   {:04.02?}%\nShips:  {:04.02?}%\nPhys:   {:04.02?}%\nRender: {:.02?}",
+				"Frame:  {:05.02?}%\nGame:   {:05.02?}%\nShips:  {:05.02?}%\nPhys:   {:05.02?}%\nRender: {:.02?}",
 				100.0 * (input.timing.frame / input.timing.render),
 				100.0 * (input.timing.galaxy / input.timing.frame),
 				100.0 * (input.timing.physics_sim / input.timing.frame),
diff --git a/crates/render/src/ui/radar.rs b/crates/render/src/ui/radar.rs
index 69bcfdd..85e4a69 100644
--- a/crates/render/src/ui/radar.rs
+++ b/crates/render/src/ui/radar.rs
@@ -32,9 +32,9 @@ impl Radar {
 			.unwrap();
 
 		let player_position = util::rigidbody_position(player_body);
-		let planet_sprite = input.content.get_sprite_handle("ui::planetblip");
-		let ship_sprite = input.content.get_sprite_handle("ui::shipblip");
-		let arrow_sprite = input.content.get_sprite_handle("ui::centerarrow");
+		let planet_sprite = input.ct.get_sprite_handle("ui::planetblip");
+		let ship_sprite = input.ct.get_sprite_handle("ui::shipblip");
+		let arrow_sprite = input.ct.get_sprite_handle("ui::centerarrow");
 
 		// Enforce buffer limit
 		if state.vertex_buffers.ui_counter as u64 > UI_SPRITE_INSTANCE_LIMIT {
@@ -52,13 +52,13 @@ impl Radar {
 				angle: 0.0,
 				size: radar_size,
 				color: [1.0, 1.0, 1.0, 1.0],
-				sprite_index: input.content.get_sprite_handle("ui::radar").get_index(),
+				sprite_index: input.ct.get_sprite_handle("ui::radar").get_index(),
 			}]),
 		);
 		state.vertex_buffers.ui_counter += 1;
 
 		// Draw system objects
-		let system = input.content.get_system(input.current_system);
+		let system = input.ct.get_system(input.current_system);
 		for o in &system.objects {
 			let size = (o.size / o.pos.z) / (radar_range * system_object_scale);
 			let p = Point2 {
@@ -107,17 +107,17 @@ impl Radar {
 		for (s, r) in input.systemsim.iter_ship_body() {
 			// This will be None if this ship is dead.
 			// Stays around while the physics system runs a collapse sequence
-			let color = match input.data.get_ship(s.data_handle) {
+			let color = match input.gx.get_ship(s.data_handle) {
 				None => {
 					// TODO: configurable
 					[0.2, 0.2, 0.2, 1.0]
 				}
 				Some(data) => {
-					let c = input.content.get_faction(data.get_faction()).color;
+					let c = input.ct.get_faction(data.get_faction()).color;
 					[c[0], c[1], c[2], 1.0]
 				}
 			};
-			let ship = input.content.get_ship(s.data_handle.content_handle());
+			let ship = input.ct.get_ship(s.data_handle.content_handle());
 			let size = (ship.size * ship.sprite.aspect) * ship_scale;
 			let p = util::rigidbody_position(r);
 			let d = (p - player_position) / radar_range;
@@ -167,7 +167,7 @@ impl Radar {
 		let d = d * (radar_size / 2.0);
 		let color = [0.3, 0.3, 0.3, 1.0];
 		if m < 0.8 {
-			let sprite = input.content.get_sprite_handle("ui::radarframe");
+			let sprite = input.ct.get_sprite_handle("ui::radarframe");
 			let size = 7.0f32.min((0.8 - m) * 70.0);
 
 			// Enforce buffer limit (this section adds four items)
diff --git a/crates/render/src/ui/status.rs b/crates/render/src/ui/status.rs
index fb41794..694404b 100644
--- a/crates/render/src/ui/status.rs
+++ b/crates/render/src/ui/status.rs
@@ -27,14 +27,11 @@ impl Status {
 
 		let player_world_object = input.systemsim.get_ship(input.player_data).unwrap();
 
-		let data = input
-			.data
-			.get_ship(player_world_object.data_handle)
-			.unwrap();
+		let data = input.gx.get_ship(player_world_object.data_handle).unwrap();
 		let max_shields = data.get_outfits().get_shield_strength();
 		let current_shields = data.get_shields();
 		let current_hull = data.get_hull();
-		let max_hull = input.content.get_ship(data.get_content()).hull;
+		let max_hull = input.ct.get_ship(data.get_content()).hull;
 
 		state.queue.write_buffer(
 			&state.vertex_buffers.ui.instances,
@@ -45,7 +42,7 @@ impl Status {
 				angle: 0.0,
 				size: 200.0,
 				color: [1.0, 1.0, 1.0, 1.0],
-				sprite_index: input.content.get_sprite_handle("ui::status").get_index(),
+				sprite_index: input.ct.get_sprite_handle("ui::status").get_index(),
 			}]),
 		);
 		state.vertex_buffers.ui_counter += 1;
diff --git a/crates/util/src/constants.rs b/crates/util/src/constants.rs
index 73fc453..ad07e6c 100644
--- a/crates/util/src/constants.rs
+++ b/crates/util/src/constants.rs
@@ -2,48 +2,6 @@
 
 // TODO: many of these should be moved to a config file or cli option
 
-/// Minimum zoom level
-pub const ZOOM_MIN: f32 = 200.0;
-/// Maximum zoom level
-pub const ZOOM_MAX: f32 = 2000.0;
-
-/// Z-axis range for starfield stars
-/// This does not affect scale.
-pub const STARFIELD_Z_MIN: f32 = 75.0;
-/// Z-axis range for starfield stars
-/// This does not affect scale.
-pub const STARFIELD_Z_MAX: f32 = 200.0;
-
-/// Size range for starfield stars, in game units.
-/// This is scaled for zoom, but NOT for distance.
-pub const STARFIELD_SIZE_MIN: f32 = 0.2;
-/// Size range for starfield stars, in game units.
-/// This is scaled for zoom, but NOT for distance.
-pub const STARFIELD_SIZE_MAX: f32 = 1.8;
-
-/// Size of a square starfield tile, in game units.
-/// A tile of size STARFIELD_Z_MAX * screen-size-in-game-units
-/// will completely cover a (square) screen. This depends on zoom!
-///
-/// Use a value smaller than zoom_max for debug.
-pub const STARFIELD_SIZE: u64 = STARFIELD_Z_MAX as u64 * ZOOM_MAX as u64;
-
-/// Average number of stars per game unit
-pub const STARFIELD_DENSITY: f64 = 0.01;
-
-/// Number of stars in one starfield tile
-/// Must fit inside an i32
-pub const STARFIELD_COUNT: u64 = (STARFIELD_SIZE as f64 * STARFIELD_DENSITY) as u64;
-
-/// Name of starfield sprite
-pub const STARFIELD_SPRITE_NAME: &'static str = "starfield";
-
-/// Root directory of game content
-pub const CONTENT_ROOT: &'static str = "./content";
-
-/// Root directory of game images
-pub const IMAGE_ROOT: &'static str = "./assets/render";
-
 /// We can draw at most this many object sprites on the screen.
 pub const OBJECT_SPRITE_INSTANCE_LIMIT: u64 = 500;
 
@@ -57,9 +15,6 @@ pub const RADIALBAR_SPRITE_INSTANCE_LIMIT: u64 = 10;
 /// The size of our circular particle buffer. When we create particles, the oldest ones are replaced.
 pub const PARTICLE_SPRITE_INSTANCE_LIMIT: u64 = 1000;
 
-/// Must be small enough to fit in an i32
-pub const STARFIELD_SPRITE_INSTANCE_LIMIT: u64 = STARFIELD_COUNT * 24;
-
 /// The maximum number of sprites we can define
 pub const SPRITE_LIMIT: u32 = 1024;