I am using Sketchup Make to trial re-modelling ideas based on a super-accurate 2D survey of the existing building and garden. House is on two and one-half levels and sits in a 25 deg hillside with irregular spaces, retaining walls and boundaries. Rearmost retaining wall is about 30 feet above basement. Irregular flights of steps rise to garden above via a back yard.
I know Sketchup drawings usually start with solids to be carved out, but I need separate, hidden layers for each floor, roof and the exterior spaces. I planned to start from basement level and ‘raise’ everything into 3D using Push-Pull. But Sketchup doesn’t recognize my 3D elements as solids, which I need to start carving out windows and doors in the usual way? I have tried Solid Tools to ‘heal’ and ‘glue’ my components with no success so far.
Is there a clever way to solve this problem? Or can anyone suggest a better strategy (once the laughter dies down)?