WebGPU: render to slice of 3D texture

Category: Graphics
Type: Chromium catches up
Status: Enabled by default (Chrome 125)
Intent stage: None

Breaking change: No
Enterprise impact: None
Spec maturity: Unknown status
Web Platform Tests: Yes

WPT details: WebGPU/WGSL have a conformance test suite (https://github.com/gpuweb/cts) that is regularly pulled into Chromium and part of the testing of Dawn/Tint in Chromium. Note that tests are still being written, but the feature will not be launched until it is fully tested.

Summary

Functionality added to the WebGPU/WGSL spec after its first shipment in a browser. Adds support using a render pass to render to slices of 3D textures in addition to rendering to 2D textures. This is used in graphical algorithm to do voxelization between others.

Standards & signals

Specification: https://gpuweb.github.io/gpuweb/#dom-gpurenderpasscolorattachment-depthslice
Firefox: No signal
Safari: Closed Without a Position — Note that this is a blanket approval from Safari for additions to the v1 WebGPU/WGSL spec.
Web developers: Positive — This feature has been requested by developers multiple times.
Tracking bug: https://bugs.chromium.org/p/dawn/issues/detail?id=1020

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=webgpu%2FWGSL
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+WebGPU%3A%20render%20to%20slice%20of%203D%20texture
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=WebGPU%3A%20render%20to%20slice%20of%203D%20texture
Baseline status: https://webstatus.dev/?q=WebGPU%3A%20render%20to%20slice%20of%203D%20texture

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