Add color to faces based on the slope of the face.
Add color to faces based on the Z location (height) of the face.
When cuts that aren't flat are desired the model can be manually divided into groups representing each side of the cuts. This script helps putting the cut geometry on its own layer so it can be hidden when the model as a whole is shown.
For laying out, editing and manipulating 3D components. and to create non-photorealistic renderings and images from SketchUp models.