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Anamorphic projections with “culling”
Hi there. I’ve searched for this, but no joy.
I want to project a texture onto a geometry using camera mapping as part of an experiment into anamorphic projections – we want to test out how we can paint an office space with a logo or shape which resolves when viewed from a particular point.
In C4D I have a room with pillars in the middle and I want to create a perspectival anamorphic projection, such that, when I move the camera to a particular spot the image that is projected on the geometry looks like an ellipse, but when I move the camera to the side, we see that the texture has been projected and is “stuck” to the grometry.
The problem I have (hopefully illustrated by the images) is that the texture passes through the geometry. I want the projection to act like a film projector, so the geometry that isn’t “seen” by the camera projection does not have the texture on it.
I’ve investigated projecting texture via lights, but i want to give the impression that the image has been painted, raether than projected (which leaves shadows).
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1 Reply
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Here’s the C4D file.
I’ve also noticed that the projection doesn’t affect the back of the pillars, or the polygons onto which the projecton doesn’t fall at all, but when there’s a polygon where the projection would partially fall, the whole image is projected. A good example is the right hand side of teh ellipse projected onto the back wall of the room. Also, the area behind the pillars.
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