Carmack has said somewhere (I can't retrieve the source right now) that an alternative, slower method will be used in the GPL'd codebase, effectively working around Creative's patent claims.
Oh this is just silly. Thankfully the patented algorithm is ridiculously simple, so someone can write an open source patch to use the better stencil algorithm. No doubt whatever derivatives will spring from the D3 source will use the single pass method.
While being at it, it shouldn't be too hard to use geometry shaders for the shadow volume extraction in the D3 engine. Hmm, maybe I should do it :)
While being at it, it shouldn't be too hard to use geometry shaders for the shadow volume extraction in the D3 engine. Hmm, maybe I should do it :)