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Packing Black and White texture maps into one RGBA image?

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globglob polycounter lvl 7

I'm trying to optimize my models for opengl visualisation and one of the thing you can do is having one texture that carry all your black and white maps (AO, metallic, roughness...). Once I've baked all my maps separately, what's the best way to combine them into one texture like that? Should I do it in Blender (my main 3D program, in which I do the baking) or in Photoshop? What's the workflow?

In the end I want to be able to do something like this with my final texture: https://pasteboard.co/IqKKZUY.png

Thanks!


PS: I also have substance painter that I can use for baking if necessary but I usually prefer to use Blender since I can tweak cages and such directly in the software.




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