238197 2022-03-22 02:32:50 -0700 WebGL: rendering difference OpenGL, Metal: MSAA + disable depth_test causes depth invalid depth buffer (AMD) 2022-03-29 02:33:16 -0700 1 1 1 Unclassified WebKit WebGL WebKit Local Build Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=238118 InRadar P2 Normal --- 1 kkinnunen webkit-unassigned dino geofflang gman jonahr kbr kkinnunen kpiddington webkit-bug-importer oldest_to_newest 1853583 0 kkinnunen 2022-03-22 02:32:50 -0700 WebGL: rendering difference OpenGL, Metal, AMD: MSAA + disable depth_test causes depth invalid depth buffer iMacPro1,1 AMD OpenGL: white outer rectangle iMacPro1,1 AMD Metal: black outer rectangle https://github.com/brendan-duncan/webgl_bug_tests/blob/main/msaa_depth_buffer.html and viewed from here: https://brendan-duncan.github.io/webgl_bug_tests/msaa_depth_buffer.html From bug 238118 1853837 1 kbr 2022-03-22 12:19:31 -0700 What's the behavior on Chrome Canary, both with the defaults, and with the command line argument: --use-angle=metal ? If the two paths render identically there, then this will be fixed with the forthcoming ANGLE roll in Bug 238171. On my 2017 dual-GPU Intel/AMD MacBook Pro, I don't see a behavioral difference in either Canary or stable Safari 15.4, using gSwitch to force on the AMD GPU. This might be specific to this particular GPU family. There have certainly been other bugs specific to newer AMD GPUs than were in the 2017 MBP. 1855961 2 webkit-bug-importer 2022-03-29 02:33:16 -0700 <rdar://problem/90972518>