Awesome

Strolle

Strolle (from strålspårning) is a real-time renderer with support for dynamic global illumination:

Strolle's goal is to experiment with modern real-time lighting techniques such as ReSTIR and see how far we can go on consumer hardware, especially the one without dedicated ray-tracing cores.

Strolle comes integrated with Bevy, but can be also used on its own (through wgpu).

Status: Experimental, no official release yet (see the demo below, though!).
Platforms: Windows, Mac, Linux & WebGPU.

Gallery
Examples
Usage
Roadmap

Gallery

(note that currently there's no denoiser for specular lighting)

Examples

Dungeon

$ cargo run --release --example demo

Shows a dungeon tech demo, as in the example above.

Use WASD to move, mouse to navigate the camera, and:

H/L: Adjust sun's azimuth,
J/K: Adjust sun's altitude,
F: Toggle flashlight on/off,
M: Toggle diffuse/specular materials,
T: Remove textures,
1: Show the final, composed image¹ (default),
2: Show direct-diffuse lighting only¹,
3: Show direct-specular lighting only¹,
4: Show indirect-diffuse lighting only¹,
5: Show indirect-specular lighting only¹,
8: Show BVH heatmap,
9: Switch camera to a path-traced reference mode (slow),
0: Switch camera to Bevy's renderer,
;: Toggle camera's controls on/off - useful for taking screenshots.

¹ press the same key again to toggle denoising on/off

Model thanks to:
https://sketchfab.com/3d-models/low-poly-game-level-82b7a937ae504cfa9f277d9bf6874ad2

Cornell Box

$ cargo run --release --example cornell

Usage

Bevy

Currently supported Bevy version: 0.12.1.

Add Strolle to your dependencies:

[dependencies]
bevy_strolle = { git = "https://github.com/patryk27/strolle" }

Add a patch to work-around a bug in Naga:

[patch."crates-io"]
naga = { git = "https://github.com/Patryk27/naga", branch = "v0.13.0-strolle" }

Setup & enjoy!

App::new()
    /* ... */
    .add_plugins(StrollePlugin);

commands
    .spawn(Camera3dBundle {
        camera_render_graph: CameraRenderGraph::new(
            bevy_strolle::graph::NAME,
        ),
        camera: Camera {
            hdr: true,
            ..default()
        },
        ..default()
    });

Note that Strolle completely overrides Bevy's camera graph, so you can't use a Strolle camera together with Bevy's effects such as bloom or TAA - fragment and vertex shaders won't work as well.

Also, Strolle is not optimized well towards higher resolutions - on non-high-end GPUs, it's recommended to stick to ~800x600 and upscale the camera instead (see the demo.rs here).

Roadmap

https://github.com/Patryk27/strolle/issues?q=is%3Aissue+is%3Aopen+label%3AC-bug%2CC-feature

Algorithms

Notable algorithms implemented in Strolle include:

License

MIT License