To ensure your 3D content feels grounded and correctly scaled within the photo:
Using fSpy with 3ds Max gives accurate camera matching for compositing and visualization. For reliability, use the Blender bridge (fSpy add-on → FBX) or carefully transfer focal length, sensor size, position, rotation, and principal point from fSpy's output into a 3ds Max Physical Camera. fspy 3ds max top
Adjust the and Distance until the grid aligns with the floor. To ensure your 3D content feels grounded and