[Webkit-unassigned] [Bug 240919] Material issues on Mac/iOS with WebGL via Metal

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=240919

--- Comment #7 from Kyle Piddington <kpiddington at apple.com> ---
I think I understand what's going on:

We've added EXT_Color_buffer_float support to the Metal based backend for WebGL. However, Cesium doesn't consider the limitations of EXT_Color_buffer_float when performing rendering.

Specifically, please note the limitations here:
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_color_buffer_float.txt

By default, EXT_color_buffer_float does not require blending for R32F, RG32F, and RGBA32F textures. You also must check for GL_EXT_float_blend support.

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