Hi, I'm not an Moi3D expert.

1. You can use moi for interior/exterior design.
2. You can import step,dxf,obj not skp sketchup files. but can use outside program first to get skp to .obj or dxf for instance.
3. Moi only supports shaders by (Styles), which are rgb colors. Texturing work should be done outside of moi.
4. Moi is a nurbs modeler primarily and not intended for rendering inside of.

Hope that helps a bit.

Jason