-bsp -deep - include detail brushes into BSP tree generation (but at lowest possible priority), but still ignore them for vis
-vis -mergeportals - only merge vis portals on the same plane, but don't merge clusters (much faster vis, but only slightly worse - will evaluate later why it's worse vis at all)
git-svn-id: svn://svn.icculus.org/netradiant/trunk@244 61c419a2-8eb2-4b30-bcec-8cead039b335