Bake 3 texture B/W maps into one using RGB

I am importing my blender models to Unreal. I make the materials in Unreal and I am beginning to use masks to make the models more interesting. The problem is that Unreal accepts a low number of textures per material, so it is normal to use the three channels RGB to save the metallic/rough/AO maps in one texture. I have the three textures separated and I would like to know how to bake them in a unique texture, each one of them in one channel. I am sure it is an easy thing to do, but I really can’t think of how to do it. Thanks.

@DanM

Any input on your side as to having all 3 as i dont think we cover this in detail in the blender courses.
I’m not even entirely sure how to bake out those to a single map

Grant covers this (or at least the basic principles) in the final character creator course lectures…
Try this:
Use a Combine RGB node and plug that into the base color of your material, then do a diffuse bake. Should do the trick…

Hope that helps.

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Thank you! Yes, it bakes well.

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