diff --git a/crates/galactica/src/game.rs b/crates/galactica/src/game.rs
index a7c1e7a..effa176 100644
--- a/crates/galactica/src/game.rs
+++ b/crates/galactica/src/game.rs
@@ -4,12 +4,12 @@ use galactica_system::data::ShipPersonality;
 use galactica_system::phys::{PhysImage, PhysSim, PhysSimShipHandle, PhysStepResources};
 use galactica_util::timing::Timing;
 use nalgebra::Point2;
-use std::rc::Rc;
+use std::sync::Arc;
 use std::time::Instant;
 
 pub struct Game {
 	// Core game data
-	ct: Rc<Content>,
+	ct: Arc<Content>,
 	phys_sim: PhysSim,
 	timing: Timing,
 	start_instant: Instant,
@@ -44,7 +44,7 @@ impl<'a> Game {
 		return player;
 	}
 
-	pub fn new(ct: Rc<Content>) -> Self {
+	pub fn new(ct: Arc<Content>) -> Self {
 		let mut phys_sim = PhysSim::new(&ct, SystemHandle { index: 0 });
 
 		let a = phys_sim.add_ship(
diff --git a/crates/galactica/src/main.rs b/crates/galactica/src/main.rs
index 9581f5d..75c64a5 100644
--- a/crates/galactica/src/main.rs
+++ b/crates/galactica/src/main.rs
@@ -21,7 +21,7 @@ use nalgebra::Vector2;
 use std::{
 	fs,
 	path::{Path, PathBuf},
-	rc::Rc,
+	sync::Arc,
 	time::Instant,
 };
 use winit::{
@@ -113,7 +113,7 @@ fn try_main() -> Result<()> {
 	}
 
 	// TODO: pretty error if missing (also in cli)
-	let content = Rc::new(Content::load_dir(
+	let content = Arc::new(Content::load_dir(
 		PathBuf::from("./content"),
 		PathBuf::from("./assets"),
 		atlas_index,
@@ -128,12 +128,12 @@ fn try_main() -> Result<()> {
 	let mut game = game::Game::new(content.clone());
 	let p = game.make_player();
 
-	let mut player = Rc::new(PlayerAgent::new(p.0));
-	Rc::get_mut(&mut player).unwrap().set_camera_aspect(
+	let mut player = Arc::new(PlayerAgent::new(p.0));
+	Arc::get_mut(&mut player).unwrap().set_camera_aspect(
 		gpu.window().inner_size().width as f32 / gpu.window().inner_size().height as f32,
 	);
 
-	let mut phys_img = Rc::new(PhysImage::new());
+	let mut phys_img = Arc::new(PhysImage::new());
 	let mut last_run = Instant::now();
 
 	event_loop.run(move |event, _, control_flow| {
@@ -162,9 +162,9 @@ fn try_main() -> Result<()> {
 			}
 
 			Event::MainEventsCleared => {
-				game.update_player_controls(Rc::get_mut(&mut player).unwrap());
+				game.update_player_controls(Arc::get_mut(&mut player).unwrap());
 				game.step(&phys_img);
-				game.update_image(Rc::get_mut(&mut phys_img).unwrap());
+				game.update_image(Arc::get_mut(&mut phys_img).unwrap());
 
 				// TODO: clean up
 				let player_status = {
@@ -193,10 +193,10 @@ fn try_main() -> Result<()> {
 				};
 
 				// This must be updated BEFORE rendering!
-				Rc::get_mut(&mut player)
+				Arc::get_mut(&mut player)
 					.unwrap()
 					.step(&content, player_status);
-				Rc::get_mut(&mut player).unwrap().input.clear_inputs();
+				Arc::get_mut(&mut player).unwrap().input.clear_inputs();
 				gpu.window().request_redraw();
 			}
 
@@ -217,39 +217,39 @@ fn try_main() -> Result<()> {
 						},
 					..
 				} => {
-					Rc::get_mut(&mut player)
+					Arc::get_mut(&mut player)
 						.unwrap()
 						.input
 						.process_key(state, key);
 				}
 				WindowEvent::CursorMoved { position, .. } => {
-					Rc::get_mut(&mut player)
+					Arc::get_mut(&mut player)
 						.unwrap()
 						.input
 						.process_mouse(position);
 				}
 				WindowEvent::MouseInput { state, button, .. } => {
-					Rc::get_mut(&mut player)
+					Arc::get_mut(&mut player)
 						.unwrap()
 						.input
 						.process_click(state, button);
 				}
 				WindowEvent::MouseWheel { delta, phase, .. } => {
-					Rc::get_mut(&mut player)
+					Arc::get_mut(&mut player)
 						.unwrap()
 						.input
 						.process_scroll(delta, phase);
 				}
 				WindowEvent::Resized(_) => {
 					gpu.resize(&content);
-					Rc::get_mut(&mut player).unwrap().set_camera_aspect(
+					Arc::get_mut(&mut player).unwrap().set_camera_aspect(
 						gpu.window().inner_size().width as f32
 							/ gpu.window().inner_size().height as f32,
 					);
 				}
 				WindowEvent::ScaleFactorChanged { .. } => {
 					gpu.resize(&content);
-					Rc::get_mut(&mut player).unwrap().set_camera_aspect(
+					Arc::get_mut(&mut player).unwrap().set_camera_aspect(
 						gpu.window().inner_size().width as f32
 							/ gpu.window().inner_size().height as f32,
 					);
diff --git a/crates/render/src/gpustate.rs b/crates/render/src/gpustate.rs
index f7b30d0..950fa4a 100644
--- a/crates/render/src/gpustate.rs
+++ b/crates/render/src/gpustate.rs
@@ -1,5 +1,3 @@
-use std::{iter, rc::Rc};
-
 use anyhow::Result;
 use bytemuck;
 use galactica_content::Content;
@@ -7,6 +5,7 @@ use galactica_system::data::ShipState;
 use galactica_util::to_radians;
 use glyphon::{FontSystem, Resolution, SwashCache, TextAtlas, TextRenderer};
 use nalgebra::{Point2, Point3};
+use std::{iter, sync::Arc};
 use wgpu;
 use winit;
 
@@ -38,7 +37,7 @@ pub struct GPUState {
 
 impl GPUState {
 	/// Make a new GPUState that draws on `window`
-	pub async fn new(window: winit::window::Window, ct: Rc<Content>) -> Result<Self> {
+	pub async fn new(window: winit::window::Window, ct: Arc<Content>) -> Result<Self> {
 		let window_size = window.inner_size();
 		let window_aspect = window_size.width as f32 / window_size.height as f32;
 
@@ -278,7 +277,7 @@ impl GPUState {
 
 	/// Main render function. Draws sprites on a window.
 	pub fn render(&mut self, input: RenderInput) -> Result<(), wgpu::SurfaceError> {
-		let input = Rc::new(input);
+		let input = Arc::new(input);
 
 		// Update global values
 		self.state.queue.write_buffer(
diff --git a/crates/render/src/pipeline.rs b/crates/render/src/pipeline.rs
index b2dfc11..23d0b2f 100644
--- a/crates/render/src/pipeline.rs
+++ b/crates/render/src/pipeline.rs
@@ -1,4 +1,3 @@
-use std::rc::Rc;
 use wgpu;
 
 use crate::vertexbuffer::VertexBuffer;
@@ -16,7 +15,7 @@ pub struct PipelineBuilder<'a> {
 	// These must be provided
 	shader: Option<&'a str>,
 	format: Option<wgpu::TextureFormat>,
-	vertex_buffer: Option<&'a Rc<VertexBuffer>>,
+	vertex_buffer: Option<&'a VertexBuffer>,
 }
 
 impl<'a> PipelineBuilder<'a> {
@@ -49,7 +48,7 @@ impl<'a> PipelineBuilder<'a> {
 		self
 	}
 
-	pub fn set_vertex_buffer(mut self, vertex_buffer: &'a Rc<VertexBuffer>) -> Self {
+	pub fn set_vertex_buffer(mut self, vertex_buffer: &'a VertexBuffer) -> Self {
 		self.vertex_buffer = Some(vertex_buffer);
 		self
 	}
diff --git a/crates/render/src/renderinput.rs b/crates/render/src/renderinput.rs
index 19d9db6..f19e04a 100644
--- a/crates/render/src/renderinput.rs
+++ b/crates/render/src/renderinput.rs
@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::sync::Arc;
 
 use galactica_content::{Content, SystemHandle};
 use galactica_playeragent::PlayerAgent;
@@ -13,7 +13,7 @@ pub struct RenderInput {
 	pub camera_pos: Vector2<f32>,
 
 	/// Player ship data
-	pub player: Rc<PlayerAgent>,
+	pub player: Arc<PlayerAgent>,
 
 	/// The system we're currently in
 	pub current_system: SystemHandle,
@@ -22,7 +22,7 @@ pub struct RenderInput {
 	pub camera_zoom: f32,
 
 	/// The world state to render
-	pub phys_img: Rc<PhysImage>,
+	pub phys_img: Arc<PhysImage>,
 
 	// TODO: handle overflow. is it a problem?
 	/// The current time, in seconds
@@ -32,7 +32,7 @@ pub struct RenderInput {
 	pub time_since_last_run: f32,
 
 	/// Game content
-	pub ct: Rc<Content>,
+	pub ct: Arc<Content>,
 
 	/// Time we spent in each part of the game loop
 	pub timing: Timing,
diff --git a/crates/render/src/renderstate.rs b/crates/render/src/renderstate.rs
index ce63e0d..1cced31 100644
--- a/crates/render/src/renderstate.rs
+++ b/crates/render/src/renderstate.rs
@@ -3,7 +3,6 @@ use galactica_util::constants::{
 	OBJECT_SPRITE_INSTANCE_LIMIT, RADIALBAR_SPRITE_INSTANCE_LIMIT, UI_SPRITE_INSTANCE_LIMIT,
 };
 use glyphon::{FontSystem, SwashCache, TextAtlas, TextRenderer};
-use std::rc::Rc;
 use wgpu::BufferAddress;
 use winit::window::Window;
 
@@ -26,10 +25,10 @@ pub(crate) struct VertexBuffers {
 	starfield_counter: BufferAddress,
 	starfield_limit: BufferAddress,
 
-	object: Rc<VertexBuffer>,
-	starfield: Rc<VertexBuffer>,
-	ui: Rc<VertexBuffer>,
-	radialbar: Rc<VertexBuffer>,
+	object: VertexBuffer,
+	starfield: VertexBuffer,
+	ui: VertexBuffer,
+	radialbar: VertexBuffer,
 }
 
 impl<'a> VertexBuffers {
@@ -41,53 +40,53 @@ impl<'a> VertexBuffers {
 			starfield_counter: 0,
 			starfield_limit: ct.get_config().starfield_instance_limit,
 
-			object: Rc::new(VertexBuffer::new::<TexturedVertex, ObjectInstance>(
+			object: VertexBuffer::new::<TexturedVertex, ObjectInstance>(
 				"object",
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
 				OBJECT_SPRITE_INSTANCE_LIMIT,
-			)),
+			),
 
-			starfield: Rc::new(VertexBuffer::new::<TexturedVertex, StarfieldInstance>(
+			starfield: VertexBuffer::new::<TexturedVertex, StarfieldInstance>(
 				"starfield",
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
 				ct.get_config().starfield_instance_limit,
-			)),
+			),
 
-			ui: Rc::new(VertexBuffer::new::<TexturedVertex, UiInstance>(
+			ui: VertexBuffer::new::<TexturedVertex, UiInstance>(
 				"ui",
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
 				UI_SPRITE_INSTANCE_LIMIT,
-			)),
+			),
 
-			radialbar: Rc::new(VertexBuffer::new::<TexturedVertex, RadialBarInstance>(
+			radialbar: VertexBuffer::new::<TexturedVertex, RadialBarInstance>(
 				"radial bar",
 				&device,
 				Some(SPRITE_VERTICES),
 				Some(SPRITE_INDICES),
 				10,
-			)),
+			),
 		}
 	}
 
-	pub fn get_ui(&'a self) -> &'a Rc<VertexBuffer> {
+	pub fn get_ui(&'a self) -> &'a VertexBuffer {
 		&self.ui
 	}
 
-	pub fn get_object(&'a self) -> &'a Rc<VertexBuffer> {
+	pub fn get_object(&'a self) -> &'a VertexBuffer {
 		&self.object
 	}
 
-	pub fn get_radialbar(&'a self) -> &'a Rc<VertexBuffer> {
+	pub fn get_radialbar(&'a self) -> &'a VertexBuffer {
 		&self.radialbar
 	}
 
-	pub fn get_starfield(&'a self) -> &'a Rc<VertexBuffer> {
+	pub fn get_starfield(&'a self) -> &'a VertexBuffer {
 		&self.starfield
 	}
 }
diff --git a/crates/render/src/ui/api/radialelement.rs b/crates/render/src/ui/api/radialelement.rs
index 21d2f66..336e9a4 100644
--- a/crates/render/src/ui/api/radialelement.rs
+++ b/crates/render/src/ui/api/radialelement.rs
@@ -1,13 +1,13 @@
 use galactica_content::Content;
 use rhai::{CustomType, TypeBuilder};
-use std::{cell::RefCell, rc::Rc};
+use std::{cell::RefCell, rc::Rc, sync::Arc};
 
 use crate::ui::util::RadialBar;
 
 #[derive(Debug, Clone)]
 pub struct RadialElement {
 	pub bar: Rc<RefCell<RadialBar>>,
-	pub ct: Rc<Content>,
+	pub ct: Arc<Content>,
 }
 
 // TODO: remove this
@@ -15,7 +15,7 @@ unsafe impl Send for RadialElement {}
 unsafe impl Sync for RadialElement {}
 
 impl RadialElement {
-	pub fn new(ct: Rc<Content>, bar: Rc<RefCell<RadialBar>>) -> Self {
+	pub fn new(ct: Arc<Content>, bar: Rc<RefCell<RadialBar>>) -> Self {
 		Self { ct, bar }
 	}
 }
diff --git a/crates/render/src/ui/api/spriteelement.rs b/crates/render/src/ui/api/spriteelement.rs
index 63c1213..d0ef235 100644
--- a/crates/render/src/ui/api/spriteelement.rs
+++ b/crates/render/src/ui/api/spriteelement.rs
@@ -1,14 +1,14 @@
 use galactica_content::{resolve_edge_as_edge, Content};
 use log::error;
 use rhai::{CustomType, TypeBuilder};
-use std::{cell::RefCell, rc::Rc};
+use std::{cell::RefCell, rc::Rc, sync::Arc};
 
 use crate::ui::util::Sprite;
 
 #[derive(Debug, Clone)]
 pub struct SpriteElement {
 	pub sprite: Rc<RefCell<Sprite>>,
-	pub ct: Rc<Content>,
+	pub ct: Arc<Content>,
 }
 
 // TODO: remove this
@@ -16,7 +16,7 @@ unsafe impl Send for SpriteElement {}
 unsafe impl Sync for SpriteElement {}
 
 impl SpriteElement {
-	pub fn new(ct: Rc<Content>, sprite: Rc<RefCell<Sprite>>) -> Self {
+	pub fn new(ct: Arc<Content>, sprite: Rc<RefCell<Sprite>>) -> Self {
 		Self { ct, sprite }
 	}
 
diff --git a/crates/render/src/ui/api/state.rs b/crates/render/src/ui/api/state.rs
index a8ac112..cb3ef9e 100644
--- a/crates/render/src/ui/api/state.rs
+++ b/crates/render/src/ui/api/state.rs
@@ -5,14 +5,14 @@ use galactica_system::{
 };
 use log::error;
 use rhai::{CustomType, TypeBuilder};
-use std::rc::Rc;
+use std::sync::Arc;
 
 use crate::RenderInput;
 
 #[derive(Debug, Clone)]
 pub struct ShipState {
 	ship: Option<PhysSimShipHandle>,
-	input: Rc<RenderInput>,
+	input: Arc<RenderInput>,
 }
 
 // TODO: remove this
@@ -94,7 +94,7 @@ impl CustomType for ShipState {
 #[derive(Debug, Clone)]
 pub struct SystemObjectState {
 	object: Option<SystemObjectHandle>,
-	input: Rc<RenderInput>,
+	input: Arc<RenderInput>,
 }
 
 // TODO: remove this
@@ -152,7 +152,7 @@ impl CustomType for SystemObjectState {
 
 #[derive(Debug, Clone)]
 pub struct State {
-	input: Rc<RenderInput>,
+	input: Arc<RenderInput>,
 }
 
 // TODO: remove this
@@ -160,7 +160,7 @@ unsafe impl Send for State {}
 unsafe impl Sync for State {}
 
 impl State {
-	pub fn new(input: Rc<RenderInput>) -> Self {
+	pub fn new(input: Arc<RenderInput>) -> Self {
 		Self { input }
 	}
 
diff --git a/crates/render/src/ui/manager.rs b/crates/render/src/ui/manager.rs
index c7405fe..8c8cb8c 100644
--- a/crates/render/src/ui/manager.rs
+++ b/crates/render/src/ui/manager.rs
@@ -4,7 +4,7 @@ use galactica_system::phys::PhysSimShipHandle;
 use glyphon::TextArea;
 use log::{debug, error, trace};
 use rhai::{Array, Dynamic, Engine, Map, Scope};
-use std::{collections::HashSet, num::NonZeroU32, rc::Rc};
+use std::{collections::HashSet, num::NonZeroU32, sync::Arc};
 
 use super::{
 	api::{
@@ -28,7 +28,7 @@ pub(crate) struct UiManager {
 	current_scene_config: SceneConfig,
 	engine: Engine,
 	scope: Scope<'static>,
-	ct: Rc<Content>,
+	ct: Arc<Content>,
 
 	/// UI elements
 	elements: Vec<UiElement>,
@@ -42,7 +42,7 @@ pub(crate) struct UiManager {
 }
 
 impl UiManager {
-	pub fn new(ct: Rc<Content>, state: &mut RenderState) -> Self {
+	pub fn new(ct: Arc<Content>, state: &mut RenderState) -> Self {
 		let scope = Scope::new();
 
 		let mut engine = Engine::new_raw();
@@ -70,7 +70,7 @@ impl UiManager {
 	pub fn set_scene(
 		&mut self,
 		state: &mut RenderState,
-		input: Rc<RenderInput>,
+		input: Arc<RenderInput>,
 		scene: String,
 	) -> Result<()> {
 		if !self.ct.get_config().ui_scenes.contains_key(&scene) {
@@ -207,7 +207,7 @@ impl UiManager {
 	}
 
 	/// Draw all ui elements
-	pub fn draw(&mut self, input: Rc<RenderInput>, state: &mut RenderState) -> Result<()> {
+	pub fn draw(&mut self, input: Arc<RenderInput>, state: &mut RenderState) -> Result<()> {
 		// Initialize start scene if we haven't yet
 		if self.current_scene.is_none() {
 			self.set_scene(
@@ -372,7 +372,7 @@ impl UiManager {
 	fn handle_action(
 		&mut self,
 		state: &mut RenderState,
-		input: Rc<RenderInput>,
+		input: Arc<RenderInput>,
 		action: SceneAction,
 	) -> Result<bool> {
 		Ok(match action {
diff --git a/crates/system/src/phys/stepresources.rs b/crates/system/src/phys/stepresources.rs
index abf3e7e..d8f2b4f 100644
--- a/crates/system/src/phys/stepresources.rs
+++ b/crates/system/src/phys/stepresources.rs
@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::sync::Arc;
 
 use galactica_content::Content;
 use galactica_util::timing::Timing;
@@ -6,7 +6,7 @@ use galactica_util::timing::Timing;
 /// External resources we need to compute time steps
 pub struct PhysStepResources<'a> {
 	/// Game content
-	pub ct: Rc<Content>,
+	pub ct: Arc<Content>,
 
 	/// Length of time step
 	pub t: f32,