I tried the GitHub version as a plugin/addon for Godot and had a problem. Godot told me that plugin.gd had an error in the code when I tried to activate it. Any thoughts? I simply downloaded the master and put the addons folder into the project.
I don't remember if the plug-in version is still supported. Try loading Material Maker as a standalone tool by importing its `project.godot` file into the Project Manager.
Fixing Godot integration is my next task. The addon will provide an import plugin that generates SpatialMaterials from .ptex files (textures can either be prerendered, or generated at runtime). It will not be possible to run Material Maker inside Godot anymore.
