Terrain Mixer builds landscapes by mixing height maps in a node graph rather than sculpting them by hand. You feed it up to nine height inputs, blend and rotate them with masks, and read the result back as displacement in Cycles — with Geometry Nodes handling erosion on top. It targets the gap between a flat displaced plane and a full external terrain package.
What It Does
- Mixes up to nine height map inputs into one terrain, with per-input masks and rotation
- Applies erosion through Geometry Nodes, so the weathering is procedural rather than painted
- Shapes terrain directly in the viewport instead of round-tripping through an external tool
- Bakes the result to texture for export into a game engine
- Pulls high-resolution height map assets from a library you download from inside Blender
Good To Know
- Free and open source under GPL-3.0-or-later, by zets
- Version 3.1.3, Blender 4.2 LTS and newer, 64 MB — large because the height map library ships with it
- Cycles only. The terrain is shader displacement, so EEVEE will not give you the same result
- 37,100+ downloads on Blender Extensions, rated 5.0 from 5 reviews
- The 8K EXR height maps are distributed separately by the developer, not bundled in the extension
Where It Fits
This is for environment work that renders in Cycles — establishing shots, backgrounds, stills where you need a convincing landscape without leaving Blender. If your pipeline is EEVEE or you need the terrain as real geometry from the start, the shader-displacement approach will fight you, and the bake-to-texture route is the workaround rather than the design. For a Cycles environment artist who currently hand-sculpts mountains, it removes the slowest part of the job.