Coming up in 5.21: Support for BSP subdividing of 512 up from 240

Coming up in 5.21: Support for BSP subdividing of 512 up from 240, resulting in significantly less WPOLY requirements for big surfaces.

Less WPOLY = more FPS + bigger maps!

Compile comparison: https://pastebin.com/cY3wgwBy Wireframe comparison: https://twitter.com/sven_co_op/status/1165194741723684864