“EisenScript is a programming language designed by Mikael Hvidtfeldt for generating 3d structures. This language shows you that even a simple system has a big possibility to generate surprising and complex structures, and then brings a big amazing to you.”
Removing interior model faces:
1. Filters > Color Creation and Processing > Ambient Occlusion. Then applying default values worked for me.
2. Filters > Selection > Select by Vertex Quality. The small picture gave me some hint, Min quality: 0 Max quality: 0.1, the preview checkbox shows what you will select in red while you adjust.
3. Filters > Selection > Delete Selected Faces and Vertices.