With the map loaded, kick bots (in console type bot_kick, then press enter), set infinite warmup ( mp_warmup_pausetimer 1) or long warmup ( mp_warmup time A BIG NUMBER), then type mat_leafvis 3, show the potentially visible set (PVS) from your location.
You can test to see which parts of your map are being rendered in-game, and thus check to see if vbsp and vvis are doing their jobs properly. Don't want to sound too aggressive, it sounds like you misunderstood my issue tho! I didn't change much about the map at all. It's suspiciously fast and ingame it seems like it did 'a bad job'. I don't think you understood my problem? vis is compiling too fast, not too slow.
