Material Maker vs MechaPaint

Material Maker is an open-source tool for authoring procedural PBR materials with node graphs and exporting them for game engines and movie assets. It supports static and dynamic PBR, raymarching, and dynamic unlit materials. The official site lists more than 200 nodes; users can create nodes by combining existing ones or describing them in GLSL. Materials can be exported for Godot, Unity, and Unreal Engine. Unreal requires extra steps: Unreal Engine 4 needs manual material setup, while Unreal Engine 5 uses a generated Python script that must be run in Unreal. The tool provides 2D and 3D previews, image and spritesheet export, and loading of custom OBJ models. An experimental procedural-brush feature can texture 3D models. A website library offers community materials, nodes, brushes, and environments. Material Maker runs on Linux, macOS, and Windows. It is free through Itch.io, with a Steam plan at $14.99 as a one-time purchase. Its code uses the MIT License and assets use Creative Commons Zero 1.0 Universal.

MechaPaint has no write-up on Specifiction yet; its figures are above.