Post transform alpha?

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AntMan - Banned in the line of duty.

I.e, imagine a camera floating about your average fps level. Now, say you wanted to ALPHA in the seen polys of the level(I.e entityAlpha) so that they blend in. BUT, you want to do this *Without* drawing unseen polys(from that point of view)..Is this possible?

Additive blending is a mixed bag..serious overdraw, and simply doesn't work if you're using a lightmap, so the obvious solution isn't really a solution...