'rect' — orthographic box; the image is projected straight down the
forward axis with no perspective foreshortening (posters,
decals, blob shadows, UI markers).
'perspective' — perspective frustum, as if cast from a real camera /
slide projector at the projector's position. Pair with
Projector.focalLength to match a physical lens.
Frustum shape of a projector.
'rect'— orthographic box; the image is projected straight down the forward axis with no perspective foreshortening (posters, decals, blob shadows, UI markers).'perspective'— perspective frustum, as if cast from a real camera / slide projector at the projector's position. Pair with Projector.focalLength to match a physical lens.