So, if i do the PBR smoothness workflow. Which channels do i need? Can i just delete some of the PBR metallic workflow? or do i have to redo the texturing because i used channels to create textures that i wouldnt use anymore? Also, i am using unity 5. Some of my assets were created using the metallic PBR workflow. Can both…
Is there any reason why you have two different PBR workflows in your list of channels in the Texture Set settings ? You are likely using the wrong export preset, so the final bitmap is probably a channel you didn't use in the project.
For a "Smoothness" workflow you probably want the Diffuse, Specular, Glossiness and Height/Normal. However you could also use the PBR Metallic/Roughness channels, and then use our export presets to convert them to the other workflow. This can be done automatically with the right setup, see the "export preset" section here…