To use fSpy with 3ds Max, you can use a dedicated importer script to bring in the camera and image data directly. While fSpy is natively built for Blender, the 3ds Max fSpy Importer allows you to bypass manual camera matching. 🛠️ Using the fSpy Importer for 3ds Max
Historically, fSpy (and its predecessor, BLAM) was primarily used by Blender artists. However, its ability to calculate precise focal lengths, camera positions, and orientation
Download fSpy (free from fspy.io). Drag your top-down JPG or PNG into the window.
Because this is a top-down view, you cannot rely on the Y-axis. Instead:
Symptom: The floor matches perfectly, but a standing lamp or character is in the wrong spot. Solution: In a true top-down lens (telephoto), parallax is minimal. If you see this, your fSpy image was actually taken with a wide-angle lens (e.g., 18mm) looking slightly down, not straight down. You cannot fix this easily. You must go back to fSpy, add more vertical lines (Y-axis), and re-solve.
