Painting Rich Terrains in Blender
This video walks you through creating a shader node network in Blender that you can use to paint different textures on different parts of your models. It uses masks to layer shaders one on top of another and which can be quickly adjusted by using Blender's texture painting tools. Not only does this approach let you combine the color maps, but also lets you mix normal, roughness and even displacement of several different shaders into your material.
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0:00 Intro
0:43 Setting up addons and creating your mesh
3:18 Creating an initial material with displacement
7:38 Creating a second shader and overlaying it with a mask
14:57 Adding inputs and outputs to the shader nodes
17:50 Creating a linear interpolation node
22:08 Combining the mix shader and displacement mixer into a second node
23:40 Adding a third layer
29:32 Outro