how about simplifying the plugin size by excluding the material and texture library?
Here, for example, a plugin for Cinema 4d, it just contains a basic shader and, as I understand it, instances materials with textures from the scene that you import are created for it.
in other words, do not store the whole library of textures and materials in the plugin, but import only those resources that are in the Twinmotion project.
The tool is wonderful, I will emphasize once again that this is a great opportunity to bring your projects to the next level, but the size of the plugin is terribly large…