ZBrush's powerful texturing features are focused on one texture for each 3D model. Some programs assign multiple textures to models; ZBrush provides the flexibility to retain such assignments on imported models, and work on one texture at a time.

The model should be exported from the other program as an OBJ file, since this format describes all the necessary UV information for mapping textures to the model.

The procedure is simple, and the steps are described in this guide.
