EDIT: Someone gave me a fix, will leave my comment here in case anyone else hits the same problem:
camera:
mesh True matrixcolor SepiaMatrix()
Hello, I apologise if I'm missing something obvious since I don't understand shaders very well, but: I am having trouble applying a sepia filter (or any other colour transform) to images which have been edited via RGBColorize. My goal is to make everything onscreen sepia coloured. Currently I'm using "camera at sepia" where sepia is a transform using SepiaMatrix(), it makes everything sepia coloured except any images which have been edited via RGBColorize. I don't have the same problem when I edit the same images with other shaders or matrix colour transforms, so it seems to be RGBColorize specific. Is there some way to use RGBColorize differently, or a different way to make everything onscreen sepia coloured? I tried a shader based colour transform on the camera instead of a matrix based one and had the same problem.