Volumetric fog broken on WASM

[Azorlogh]

Bevy version

Release: 0.14.0

Relevant system information

• OS: Linux/X11
• Browser: Firefox and Chrome
• AdapterInfo { name: "NVIDIA GeForce GTX 980, or similar", vendor: 4318, device: 0, device_type: Other, driver: "WebGL", driver_info: "2.0", backend: Gl }

You should also consider testing the examples of our upstream dependencies to help isolate any setup-specific issue:

What you did

Opened the volumetric fog example at: https://bevyengine.org/examples/3d-rendering/volumetric-fog/

What went wrong

The example looks broken, and an error shows up in the console:

panicked at /Users/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/glow-0.13.1/src/web_sys.rs:3184:9:
Tex storage 2D multisample is not supported

Additional information

[IceSentry]

Sampling the depth texture is currently broken in wgpu in wasm with the webgl backend. The volumetric_fog feature should check for that and warn users, but it is expected to not work until the wgpu bug is resolved. It should work with the webgpu backend though.

[rparrett]

Same issue with Bevy 0.15.

I believe the relevant wgpu issue is gfx-rs/wgpu#6697.

[janhohenheim]

Little update: in Bevy 0.16, it doesn't render at all anymore for me (both Firefox and Chrome)