LongLiveTheCube

CAD2Cube - DXF Importer brings DXF files into Blender with hatch-to-mesh conversion, layer mapping, automatic unit detection, and memory-efficient block instances. A free, open-source add-on built on the bundled ezdxf library.

img2cube is a free camera-matching extension for Blender that solves perspective from a photo. Draw lines along parallel edges, click Solve, and the tool recovers focal length and rotation, then places 3D snap points.