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Chapter 19. Rendering Basics > Rendering to a Background

Rendering to a Background

Frequently renderings are required to be composited into a scene that sits on top of a background plate. Most likely a rendering will be composited into the scene later, but the lighting and camera angle must match an existing shot. The lights are fairly straightforward, but getting the camera angle perfect can be a real pain. Fortunately, we can rely on the Camera Match utility to assist us.

This utility enables CameraPoint helpers on the scene to be married to their counterparts in the background plate. The basic rules are that you need at least six points of reference, and they cannot be all coplanar. This requires careful measurement of the physical space. Exact-scale models are built in 3ds max, and the matching process can be completed. Figure 19.24 is an example of 3D geometry rendered over an existing background.


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