To get fSpy data into 3ds Max, you need a bridge. Since there isn't a native "Import fSpy" button in Max yet, we use a simple script or the manual data entry method. Phase 1: Solving in fSpy
to automate the import, or would you like a step-by-step on the FBX export method from Blender to Max? Fspy + Blender | Convert 2D Photos to 3D fspy 3ds max top