Has anyone used nDo convert diffuse to specular for texturing in commercial texturing or games ? Have things turned out successfully I've tried it and the results required alot of clean up work.
Yes, basically you can do it thru normal map or cavity (most part of it need to be redone to decrease amount of noise), but it will take same amount of time like you do it manually.
If you have a layered .PSD just correct some of them to separate different materials. If you have flattened image then you have to do all basically from start to achieve best results. If object not so big or it's a miscellaneous object you can just drop some correction layers to achieve needed spec values. If you need to convert a diffuse to albedo, well... its more difficult if there is no layers.
This is not recommended, especially with PBR. Specular map should be quite "Clean" with very specific values, so this would not produce correct results.
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If you have a layered .PSD just correct some of them to separate different materials. If you have flattened image then you have to do all basically from start to achieve best results. If object not so big or it's a miscellaneous object you can just drop some correction layers to achieve needed spec values. If you need to convert a diffuse to albedo, well... its more difficult if there is no layers.
This is not recommended, especially with PBR. Specular map should be quite "Clean" with very specific values, so this would not produce correct results.