TOOL: Terrain Edit Tools
Essential for map creation in level design. With this tool you can generate tiles to create terrains, use brushes to shape the surface, select different materials to paint the world with and more.
Create terrain with different tile configurations (set dimensions, height, texture of tiles), modify the shape of your created terrain with different brush tools or apply material to provide multiple surfaces to your world.
More details on using this tool can be found here: HOW-TO: Create a new world.
Two materials simultaneously
From the materials palette, you can have two items selected at once by using the LMB and RMB buttons: two items will be applied to different types of terrain as you paint with your brush.
Working with brushes
See some more use cases of brushes from the Terrain Edit Tools in the video below: