look at VIS for dummies... the explanation about structural vs detail is all there - and gives you an idea of WHY to do it and when NOT to do it

As your talking about what the player can see i was wonder (with fog turned off) how far is the view distance in multiplayer ?

its not the view distance - but the cull distance

Right that wasnt really an answer, im making the beach to omaha i wanted it so that with fog turned off the players cud still see the pill boxes from the landing craft. Also using the codradiant grid how far is a yard ?

ok - each grid is 1 inch

so 36 grids = 1 yard

without fog the player will see as far as his pov allows him to

brillaint coz ive done me research and the beach is 700 yards long, but i think that might be too long, ok thanks for ya help

can some 1 help me?? can some 1 refresh my mem and tell me wich of the brushes is solid and witch one is not??? (detail and structural)

structural brushes are solid.

detail brushes are not.

yea my first attemp at helping someone.lol

Detail brushes. What is detail? Stuff like stairs, trim. railings, crates, anything that will not block vis. If you change a brush to Detail it will still be solid.

What RedRum says is more correct. There is no difference in the "solid" nature of a brush when it comes to the player's perspective in-game between detail and structural.

The only distinction has to do with the engine and it's algorithms to display/hide certain portions of a map based on the players position.

If your reference to "solid" refers more to that than the ability of a player to interact (i.e. touch/stand on) with the brush in game, then we stand corrected and you need to articulate your question a bit more. I'd also suggest doing a search here for VIS and/or DETAIL to find the rest of the really good discussions that have occurred in the past.