WGSL error when using WebGPU, PBR and SSAO2 rendering pipeline

Questions
, ,
1

Hi,

I’m trying to render a scene using WebGPU and have bumped into an issue that I’m unsure if it’s a bug or just me misconfiguring the setup. What I have is a WebGPU engine, a SSAO2 rendering pipeline and a PBR material with the needDepthPrePass property sat to true. This combo causes the scene not to render and this output in the console:

installHook.js:1 BJS - [16:18:09]: WebGPU uncaptured error (1): [object GPUValidationError] - Error while parsing WGSL: :976:1 error: struct member color not found
fragmentOutputs.color= vec4f(0.,0.,0.,1.0);
^^^^^^^^^^^^^^^^^^^^^

- While calling [Device "BabylonWebGPUDevice0"].CreateShaderModule([ShaderModuleDescriptor ""fragment""]).

Is this a bug or is it me misconfiguring the scene?

Here’s a playground with a reproduction: https://playground.babylonjs.com/#302J6D#2 It works fine when using WebGL but the error appears when using WebGPU.

2

cc @Evgeni_Popov

3

Welcome aboard!

Thanks for reporting, here’s the fix:

3 Likes
4

Wow that was fast, great work!

1 Like