---- Vis 2.31 ---- Modified by Bengt Jardrup

Vis performs visual optimization of Quake .BSP files

vis [options] bspfile

Options:
   -level [n]      Full vis level 0-4, higher is better (default 4)
   -fast           Fast vis (less accurate)
   -visdist [n]    Set maximum viewing distance (default 0 = disabled)
   -nosave         Disable AutoSave feature
   -savetime [n]   Set AutoSave interval in seconds (default 60)
   -priority [n]   Set thread priority 0-2 (below/normal/above, default 1)
   -noambient      Disable all ambient sounds
   -noambientlava  Disable ambient lava
   -noambientsky   Disable ambient sky
   -noambientslime Disable ambient slime
   -noambientwater Disable ambient water
   -verbose        Print out more detailed information
   -rate [s,p,l,t] Control extended progress update rate and format, s=seconds, p=percent, l=line, t=total (default 10,1.0,1,1)
   -barpercent     Simplified and weighted bargraph progress information
   -numpercent     Simplified and weighted numerical progress information
   -oldhformat     Enable hour format HH:MM:SS instead of HHh MMm
   bspfile         .BSP file to process
