For a "top-down" matching task, you will almost always want to use . The top-down view inherently has vertical lines that should remain parallel to the camera's up vector, not converging to a vanishing point. Using 3-point perspective would falsely calculate a vertical convergence that doesn't exist in a pure top-down shot, leading to an incorrect camera orientation.

What makes this combination particularly "interesting" is the democratization of professional-grade tools. 3ds Max is a powerhouse, often seen as a standard in high-end industry workflows like architectural visualization and video game development . However, fSpy is a community-driven project. When these two meet, it creates a workflow where a free, lightweight utility provides the critical spatial data that fuels the heavy-duty rendering and modeling capabilities of 3ds Max.

The most efficient workflow often depends on your project needs and budget:

In the left panel, select your (e.g., X and Z, or Y and Z) based on the straight lines visible in your image.

For the keyword , the free fSpy combined with the manual script export remains the most powerful, accessible solution on the market.

Open fSpy and drag in your reference photo.