UDIM post processing in the Simple Baker causes extremely bright pixels when using an opacity texture

[nathkenn]

UDIM post processing in the Simple Baker causes extremely bright pixels when using an opacity texture.

I got this error when attempting to bake vegetation textures down to a plane. The leaves use an opacity texture and as the background blurring is occurring you get very bright pixels that propagate through the blur. This happens in every bake pass. This will cause serious mip mapping issues when using these textures on an alpha tested shader.

In the images none of the bright pixels were present in the source textures.