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Chapter 4Projectors and optics

4.4 The frustum

Every powered projector draws its beam: a wireframe pyramid from the lens to the surface, capped where it lands.

Projector frustums converging on the screen
Figure 4.4 Beams from the two main machines. Where they cross is the blend region; the footprint outline on the screen is the image each one actually makes.

Beams and footprints can be turned off independently in the View panel — useful once a rig has more than a handful of machines.