Is it possible to texture paint on a material that has been already assigned to an object?
The answer is YES! And these are the steps you begin with:
- Make sure to UV unwrap your model.
- Apply a material, create and add an image texture.
- Go to Texture Paint mode, and start painting directly on the model.
Remember to save the painted texture to a file or pack the image directly inside your blend file, before you lose it!