How to render back faces only?
I am trying to build a material that will render only the back faces of an object.
I've turned on "Two sided" to make sure that back faces are rendered, "masked" blend mode so that I can selectively choose which parts of the object to render. Finally I've took the "twoSidedSign" node, inverted it, and clamped between 0 and 1. My thought was since "twosidedsign" outputs -1 whenever a back face is rendering, and 1 whichever a front face is rendering, this would mask only front faces.
Instead, the entire object doesn't render. I've attached a screenshot of the rendering. Any ideas>
asked Apr 04 '14 at 03:30 PM in Rendering
Hey natemartinsf -
Try doing a LERP between 0 and 1 (A = 0 and B = 1) while using the Two Sided Sign node as your Alpha.
answered May 18 '14 at 07:13 PM
Lovecraft_K ♦♦ STAFF
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