webgpu-impl-multipass

WebGPU post-processing fails validation due to read-write hazards when sampling a texture still bound as a render attachment. Prevent this by using separate render passes and intermediate textures with RENDER_ATTACHMENT and TEXTURE_BINDING usage flags.

Set up ping-pong textures for WebGPU blur workflows by alternating between two intermediate textures across sequential passes. Ensure both textures have RENDER_ATTACHMENT and TEXTURE_BINDING usage flags to safely read and write feedback effects.

Handle depth textures for WebGPU shadow mapping by using comparison samplers specifically designed for depth textures. Maintain depth equality across passes by outputting invariant positions when depth equality matters for accurate shadow mapping.

Match fragment targets to color attachments in deferred shading by configuring Multiple Render Targets (MRT) correctly. Ensure fragment outputs map exactly to the color attachments specified in your intermediate render passes to prevent validation errors.

Yes, you need separate render passes for multi-pass WebGPU rendering to prevent read-write hazards. Organize post-processing chains, deferred shading, and shadow mapping into distinct passes that render into intermediate textures before sampling them later.

Use intermediate textures in WebGPU render pipelines when moving data across sequential passes for post-processing, deferred shading, shadow mapping, or ping-pong blur workflows. Create offscreen render targets with correct usage flags so later passes can sample them reliably.