Fails: webgl/2.0.y/conformance2/extensions/webgl-stencil-texturing.html Alexey writes: The iOS-16-Simulator-WK2-Tests-EWS failure in conformance2/extensions/webgl-stencil-texturing.html that blocks https://github.com/WebKit/WebKit/pull/17476 caused by the following: That test asserts sampling both depth and stencil values. The ES 3.0 spec defines sampled depth as [D, 0, 0, 1.0]. MSL spec explicitly says that green, blue, and alpha values are undefined. In practice it's either [D, 0, 0, 1.0] or [D, D, D, 1.0]. ANGLE uses texture swizzling to enforce ES 3.0 values for unused channels. Texture swizzle support has been force-disabled on iOS Simulator during the initial WebKit-to-Chromium ANGLE upstreaming. https://chromium-review.googlesource.com/c/angle/angle/+/2950067/33/src/libANGLE/renderer/metal/DisplayMtl.mm#954