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3727b7095a
It fixes #5046. We just generate a mesh for the pattern rectangle where the color of each vertex is computed from the function. Since the mesh is generated in the worker we don't really take into account the current transform when it's drawn. That being said, there are maybe some possible improvements in using directly the gpu for the shading creation which could then take into account the current transform, but it could only work with ps function we can convert ino wgsl language and simple enough color spaces (gray and rgb).