diff --git a/Cargo.lock b/Cargo.lock
index 9866868..c853631 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -580,6 +580,7 @@ dependencies = [
  "anyhow",
  "cgmath",
  "crossbeam",
+ "galactica-constants",
  "galactica-content",
  "galactica-render",
  "image",
@@ -592,6 +593,10 @@ dependencies = [
  "winit",
 ]
 
+[[package]]
+name = "galactica-constants"
+version = "0.0.0"
+
 [[package]]
 name = "galactica-content"
 version = "0.0.0"
@@ -612,6 +617,7 @@ dependencies = [
  "anyhow",
  "bytemuck",
  "cgmath",
+ "galactica-constants",
  "galactica-content",
  "image",
  "rand",
diff --git a/Cargo.toml b/Cargo.toml
index e956012..1e76fad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,13 +28,14 @@ rpath = false
 
 
 [workspace]
-members = ["crates/content", "crates/render"]
+members = ["crates/content", "crates/render", "crates/constants"]
 
 
 [dependencies]
 # Internal crates
 galactica-content = { path = "crates/content" }
 galactica-render = { path = "crates/render" }
+galactica-constants = { path = "crates/constants" }
 
 # Files
 image = { version = "0.24", features = ["png"] }
diff --git a/crates/constants/Cargo.toml b/crates/constants/Cargo.toml
new file mode 100644
index 0000000..5af002e
--- /dev/null
+++ b/crates/constants/Cargo.toml
@@ -0,0 +1,4 @@
+[package]
+name = "galactica-constants"
+version = "0.0.0"
+edition = "2021"
diff --git a/crates/render/src/consts_main.rs b/crates/constants/src/lib.rs
similarity index 64%
rename from crates/render/src/consts_main.rs
rename to crates/constants/src/lib.rs
index 46e6057..81ef2cb 100644
--- a/crates/render/src/consts_main.rs
+++ b/crates/constants/src/lib.rs
@@ -24,3 +24,19 @@ 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 texture
+pub const STARFIELD_TEXTURE_NAME: &'static str = "starfield";
+
+/// Root directory of game content
+pub const CONTENT_ROOT: &'static str = "./content";
+
+/// Root directory of game textures
+pub const TEXTURE_ROOT: &'static str = "./assets/render";
+
+// We can draw at most this many sprites on the screen.
+// TODO: compile-time option or config file
+pub const SPRITE_INSTANCE_LIMIT: u64 = 500;
+
+// Must be small enough to fit in an i32
+pub const STARFIELD_INSTANCE_LIMIT: u64 = STARFIELD_COUNT * 24;
diff --git a/crates/render/Cargo.toml b/crates/render/Cargo.toml
index a5a701a..d90cc89 100644
--- a/crates/render/Cargo.toml
+++ b/crates/render/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 # Internal crates
 galactica-content = { path = "../content" }
+galactica-constants = { path = "../constants" }
 
 # Misc helpers
 anyhow = "1.0"
diff --git a/crates/render/src/consts.rs b/crates/render/src/consts.rs
deleted file mode 100644
index a3e758f..0000000
--- a/crates/render/src/consts.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use crate::consts_main;
-use cgmath::Matrix4;
-
-// We can draw at most this many sprites on the screen.
-// TODO: compile-time option or config file
-pub const SPRITE_INSTANCE_LIMIT: u64 = 500;
-
-// Must be small enough to fit in an i32
-pub const STARFIELD_INSTANCE_LIMIT: u64 = consts_main::STARFIELD_COUNT * 24;
-
-/// Shader entry points
-pub const SHADER_MAIN_VERTEX: &'static str = "vertex_main";
-pub const SHADER_MAIN_FRAGMENT: &'static str = "fragment_main";
-
-#[rustfmt::skip]
-pub const OPENGL_TO_WGPU_MATRIX: Matrix4<f32> = Matrix4::new(
-	1.0, 0.0, 0.0, 0.0,
-	0.0, 1.0, 0.0, 0.0,
-	0.0, 0.0, 0.5, 0.5,
-	0.0, 0.0, 0.0, 1.0,
-);
diff --git a/crates/render/src/gpustate.rs b/crates/render/src/gpustate.rs
index a1f09c9..283a5e2 100644
--- a/crates/render/src/gpustate.rs
+++ b/crates/render/src/gpustate.rs
@@ -1,13 +1,13 @@
 use anyhow::Result;
 use bytemuck;
 use cgmath::{Deg, EuclideanSpace, Matrix4, Point2, Vector3};
+use galactica_constants;
 use std::{iter, rc::Rc};
 use wgpu;
 use winit::{self, dpi::LogicalSize, window::Window};
 
 use crate::{
-	consts::{OPENGL_TO_WGPU_MATRIX, SPRITE_INSTANCE_LIMIT, STARFIELD_INSTANCE_LIMIT},
-	consts_main, content,
+	content,
 	globaldata::{GlobalData, GlobalDataContent},
 	pipeline::PipelineBuilder,
 	sprite::ObjectSubSprite,
@@ -18,7 +18,7 @@ use crate::{
 		types::{SpriteInstance, StarfieldInstance, TexturedVertex},
 		VertexBuffer,
 	},
-	ObjectSprite, UiSprite,
+	ObjectSprite, UiSprite, OPENGL_TO_WGPU_MATRIX,
 };
 
 /// A high-level GPU wrapper. Consumes game state,
@@ -122,7 +122,7 @@ impl GPUState {
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
-				SPRITE_INSTANCE_LIMIT,
+				galactica_constants::SPRITE_INSTANCE_LIMIT,
 			)),
 
 			starfield: Rc::new(VertexBuffer::new::<TexturedVertex, StarfieldInstance>(
@@ -130,7 +130,7 @@ impl GPUState {
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
-				STARFIELD_INSTANCE_LIMIT,
+				galactica_constants::STARFIELD_INSTANCE_LIMIT,
 			)),
 		};
 
@@ -409,7 +409,7 @@ impl GPUState {
 		}
 
 		// Enforce sprite limit
-		if instances.len() as u64 > SPRITE_INSTANCE_LIMIT {
+		if instances.len() as u64 > galactica_constants::SPRITE_INSTANCE_LIMIT {
 			// TODO: no panic, handle this better.
 			panic!("Sprite limit exceeded!")
 		}
@@ -476,17 +476,17 @@ impl GPUState {
 			bytemuck::cast_slice(&[GlobalDataContent {
 				camera_position: camera_pos.into(),
 				camera_zoom: [camera_zoom, 0.0],
-				camera_zoom_limits: [consts_main::ZOOM_MIN, consts_main::ZOOM_MAX],
+				camera_zoom_limits: [galactica_constants::ZOOM_MIN, galactica_constants::ZOOM_MAX],
 				window_size: [
 					self.window_size.width as f32,
 					self.window_size.height as f32,
 				],
 				window_aspect: [self.window_aspect, 0.0],
 				starfield_texture: [self.texture_array.get_starfield_texture().index, 0],
-				starfield_tile_size: [consts_main::STARFIELD_SIZE as f32, 0.0],
+				starfield_tile_size: [galactica_constants::STARFIELD_SIZE as f32, 0.0],
 				starfield_size_limits: [
-					consts_main::STARFIELD_SIZE_MIN,
-					consts_main::STARFIELD_SIZE_MAX,
+					galactica_constants::STARFIELD_SIZE_MIN,
+					galactica_constants::STARFIELD_SIZE_MAX,
 				],
 			}]),
 		);
diff --git a/crates/render/src/lib.rs b/crates/render/src/lib.rs
index 8e6b306..d6fa4b1 100644
--- a/crates/render/src/lib.rs
+++ b/crates/render/src/lib.rs
@@ -7,7 +7,6 @@
 //! and the only one external code should interact with.
 //! (Excluding data structs, like [`ObjectSprite`])
 
-mod consts;
 mod globaldata;
 mod gpustate;
 mod pipeline;
@@ -16,9 +15,20 @@ mod starfield;
 mod texturearray;
 mod vertexbuffer;
 
-// TODO: remove
-mod consts_main;
-
 use galactica_content as content;
 pub use gpustate::GPUState;
 pub use sprite::{AnchoredUiPosition, ObjectSprite, ObjectSubSprite, UiSprite};
+
+use cgmath::Matrix4;
+
+/// Shader entry points
+pub(crate) const SHADER_MAIN_VERTEX: &'static str = "vertex_main";
+pub(crate) const SHADER_MAIN_FRAGMENT: &'static str = "fragment_main";
+
+#[rustfmt::skip]
+pub(crate) const OPENGL_TO_WGPU_MATRIX: Matrix4<f32> = Matrix4::new(
+	1.0, 0.0, 0.0, 0.0,
+	0.0, 1.0, 0.0, 0.0,
+	0.0, 0.0, 0.5, 0.5,
+	0.0, 0.0, 0.0, 1.0,
+);
diff --git a/crates/render/src/pipeline.rs b/crates/render/src/pipeline.rs
index c03e10f..b2dfc11 100644
--- a/crates/render/src/pipeline.rs
+++ b/crates/render/src/pipeline.rs
@@ -1,8 +1,8 @@
 use std::rc::Rc;
 use wgpu;
 
-use crate::consts::{SHADER_MAIN_FRAGMENT, SHADER_MAIN_VERTEX};
 use crate::vertexbuffer::VertexBuffer;
+use crate::{SHADER_MAIN_FRAGMENT, SHADER_MAIN_VERTEX};
 
 pub struct PipelineBuilder<'a> {
 	// These are provided with new()
diff --git a/crates/render/src/starfield.rs b/crates/render/src/starfield.rs
index 6f9f347..90348ae 100644
--- a/crates/render/src/starfield.rs
+++ b/crates/render/src/starfield.rs
@@ -1,7 +1,8 @@
 use cgmath::{Point2, Point3, Vector2, Vector3};
+use galactica_constants;
 use rand::{self, Rng};
 
-use crate::{consts, consts_main, vertexbuffer::types::StarfieldInstance};
+use crate::vertexbuffer::types::StarfieldInstance;
 
 pub(crate) struct StarfieldStar {
 	/// Star coordinates, in world space.
@@ -33,16 +34,20 @@ impl Starfield {
 	pub fn regenerate(&mut self) {
 		// TODO: save seed in system, regenerate on jump
 		let mut rng = rand::thread_rng();
-		let sz = consts_main::STARFIELD_SIZE as f32 / 2.0;
-		self.stars = (0..consts_main::STARFIELD_COUNT)
+		let sz = galactica_constants::STARFIELD_SIZE as f32 / 2.0;
+		self.stars = (0..galactica_constants::STARFIELD_COUNT)
 			.map(|_| StarfieldStar {
 				pos: Point3 {
 					x: rng.gen_range(-sz..=sz),
 					y: rng.gen_range(-sz..=sz),
-					z: rng.gen_range(consts_main::STARFIELD_Z_MIN..consts_main::STARFIELD_Z_MAX),
+					z: rng.gen_range(
+						galactica_constants::STARFIELD_Z_MIN..galactica_constants::STARFIELD_Z_MAX,
+					),
 				},
-				size: rng
-					.gen_range(consts_main::STARFIELD_SIZE_MIN..consts_main::STARFIELD_SIZE_MAX),
+				size: rng.gen_range(
+					galactica_constants::STARFIELD_SIZE_MIN
+						..galactica_constants::STARFIELD_SIZE_MAX,
+				),
 				tint: Vector2 {
 					x: rng.gen_range(0.0..=1.0),
 					y: rng.gen_range(0.0..=1.0),
@@ -52,17 +57,17 @@ impl Starfield {
 	}
 
 	pub fn make_instances(&mut self, aspect: f32) -> Vec<StarfieldInstance> {
-		let sz = consts_main::STARFIELD_SIZE as f32;
+		let sz = galactica_constants::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)) * consts_main::ZOOM_MAX;
+			let clip_nw = Point2::from((aspect, 1.0)) * galactica_constants::ZOOM_MAX;
 
 			// Parallax correction.
 			// Also, adjust v for mod to work properly
 			// (v is centered at 0)
-			let v: Point2<f32> = clip_nw * consts_main::STARFIELD_Z_MIN;
+			let v: Point2<f32> = clip_nw * galactica_constants::STARFIELD_Z_MIN;
 			let v_adj: Point2<f32> = (v.x + (sz / 2.0), v.y + (sz / 2.0)).into();
 
 			#[rustfmt::skip]
@@ -86,8 +91,10 @@ 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) * consts_main::STARFIELD_COUNT as i32)
-			> consts::STARFIELD_INSTANCE_LIMIT as i32
+		while ((nw_tile.x * 2 + 1)
+			* (nw_tile.y * 2 + 1)
+			* galactica_constants::STARFIELD_COUNT as i32)
+			> galactica_constants::STARFIELD_INSTANCE_LIMIT as i32
 		{
 			nw_tile -= Vector2::from((1, 1));
 		}
@@ -112,7 +119,7 @@ impl Starfield {
 		}
 
 		// Enforce starfield limit
-		if instances.len() as u64 > consts::STARFIELD_INSTANCE_LIMIT {
+		if instances.len() as u64 > galactica_constants::STARFIELD_INSTANCE_LIMIT {
 			unreachable!("Starfield limit exceeded!")
 		}
 		self.instance_count = instances.len() as u32;
diff --git a/src/consts.rs b/src/consts.rs
deleted file mode 100644
index de0bbd6..0000000
--- a/src/consts.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-pub const ZOOM_MIN: f32 = 200.0;
-pub const ZOOM_MAX: f32 = 2000.0;
-
-/// Name of starfield texture
-pub const STARFIELD_TEXTURE_NAME: &'static str = "starfield";
-
-/// Root directory of game content
-pub const CONTENT_ROOT: &'static str = "./content";
-
-/// Root directory of game textures
-pub const TEXTURE_ROOT: &'static str = "./assets/render";
diff --git a/src/game/game.rs b/src/game/game.rs
index 20da277..a53e676 100644
--- a/src/game/game.rs
+++ b/src/game/game.rs
@@ -1,11 +1,12 @@
 use cgmath::{Deg, InnerSpace, Point2};
+use galactica_constants;
 use galactica_render::{AnchoredUiPosition, ObjectSprite, UiSprite};
 use std::time::Instant;
 use winit::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, VirtualKeyCode};
 
 use super::{camera::Camera, outfits, system::System};
 use crate::{
-	consts, content,
+	content,
 	inputstatus::InputStatus,
 	physics::{util, Physics, ShipHandle},
 	shipbehavior::{self, ShipBehavior},
@@ -179,8 +180,8 @@ impl Game {
 		self.physics.step(t, &self.content);
 
 		if self.input.v_scroll != 0.0 {
-			self.camera.zoom =
-				(self.camera.zoom + self.input.v_scroll).clamp(consts::ZOOM_MIN, consts::ZOOM_MAX);
+			self.camera.zoom = (self.camera.zoom + self.input.v_scroll)
+				.clamp(galactica_constants::ZOOM_MIN, galactica_constants::ZOOM_MAX);
 			self.input.v_scroll = 0.0;
 		}
 
diff --git a/src/main.rs b/src/main.rs
index 66fd67e..93759ff 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,3 @@
-mod consts;
 mod game;
 mod inputstatus;
 mod objects;
@@ -8,6 +7,7 @@ mod shipbehavior;
 pub use galactica_content as content;
 
 use anyhow::Result;
+use galactica_constants;
 use std::path::PathBuf;
 use winit::{
 	event::{Event, KeyboardInput, WindowEvent},
@@ -18,9 +18,9 @@ use winit::{
 fn main() -> Result<()> {
 	// TODO: error if missing
 	let content = content::Content::load_dir(
-		PathBuf::from(consts::CONTENT_ROOT),
-		PathBuf::from(consts::TEXTURE_ROOT),
-		consts::STARFIELD_TEXTURE_NAME.to_owned(),
+		PathBuf::from(galactica_constants::CONTENT_ROOT),
+		PathBuf::from(galactica_constants::TEXTURE_ROOT),
+		galactica_constants::STARFIELD_TEXTURE_NAME.to_owned(),
 	)?;
 
 	let event_loop = EventLoop::new();