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by teh_g 2243 days ago
Sketching (2D/3D) with pencil and paper for rough ideas.

As soon as any accuracy is needed, AutoCAD for 2D and/or Blender for 3D. Blender is usually enough, but I'm faster in AutoCAD.

If possible, I try to physically experience the new space or object, using my imagination and any props at hand. For example, I might put masking tape on the floor, following the layout of the drawing, and walk around them pretending they are obstacles.