

You can either paint directly on the 3D model, or you can paint in 2D on top of the UV map. The painting aspect supports multiple textures, and you can create layers and have fine tune brush control like you would expect from a traditional 2D painting application.

It is simply a matter of creating a material, either from existing PBR textures, or procedurally, then in the same application you can paint directly on a 3D model you import (in FBX or OBJ format). Agama Materials is a free application for Windows PCs that enables you to both create procedural materials using a node based approach like Substance Painter, as well as paint on 3D models like Substance Designer.
