Currently, during baking each pixel stores a seed input that comes from the Blender side. This is only needed for vertex color baking, however - for regular image baking, we can just as well hash the pixel coordinates. Therefore, we can save some memory (4 byte per pixel) by splitting the seed info out into a separate pass and only storing it when needed. Pull Request: https://projects.blender.org/blender/blender/pulls/122806