size

Heya so I made a fully custom map but when it's made into a .bsp at the end its 1.56 GB. How do I reduce the file size of it? I tried the usual compression programs like BSPZip but I get an " Out of memory or address space. Texture quality setting may be too high. " error. I have 16 GB of RAM...

Ever since Uncle Dane and some other people got the approximated playable sizes of the core maps, I thought if this would be useful in some way for map makers. Then I thought that it might explain why some maps are just not (as) fun to play. For instance I feel that Enclosure is way too long...