Click on the slot, choose Bitmap / Physical Map , and load your background image. Press Alt + B to open the Viewport Configuration window.
You simply align two sets of parallel lines (usually X and Y, or X and Z) along known architectural or environmental edges. fspy 3ds max top
Since we have no vertical lines (Z), we only define X and Y. Click on the slot, choose Bitmap / Physical
: It computes exact lens parameters using simple, color-coded guidelines mapped directly onto an image's natural parallel lines. Since we have no vertical lines (Z), we only define X and Y
Because of the variance between Y-Up and Z-Up software orientations, you may need to map the rotation values manually if you did not switch the preview axis in fSpy: fSpy X Rotation →right arrow 3ds Max X Rotation fSpy Y Rotation →right arrow 3ds Max Z Rotation fSpy Z Rotation →right arrow 3ds Max Y Rotation
fSpy assumes a "perfect" lens. If your photo was shot with a wide-angle lens, it likely has "barrel distortion" (curved lines). For top-tier results, undistort the image in Photoshop or Lightroom before bringing it into fSpy. Conclusion
Under the tab, select Files and load the original background image. Ensure Aspect Ratio is set to Match Rendering Output .