Thanks! Yes, all blender + cycles, with a very simple setup, just a sunlight. About the plans, no, they are...

Commenting post 27: Thanks! Yes, all blender + cycles, with a very simple setup, just a sunlight. About the plans, no, they are pretty old (2007). They were done manually with traditional 2D CAD. I don't remember exactly what we used at that time, but it was probably autocad.