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LOD Dependant Ray-Bezier Patch Intersection

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Hello all, does anyone have any good links, info on LOD dependent ray-bezier patch intersection. The reason for LOD dependency is so that objects wont bounce of faces that arent visibly there. Currently the only method ive thought of is to generate the patch and do collision detection against the resultant triangles ( possibly using an octree to speed this up ). are there any other fast/faster methods. Thanks in advance. Mark

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