Hi i imported model from 3dmax and i can see it i can put texture on it but when in game i can go thru the object. weird is that few of my first buildings i cannot go thru even if it have the same texture i can shoot at it and the building a meter next to it i can go thru .i read something about textures and collision but can somebody help me to understand what happend there and what can i do?

Sounds like you need a physics proxy: http://freesdk.crydev.net/display/SDKDOC3/Physics+Proxy

Thanx i will study this but im very interested in what i did i think it has something to do with textures cos when i started putting my objects in my map i remember i put there two buildings both was put together from moore pieces and beacuse they were dark i put some reflecting texture and than these two buildings was solid(meaning i cannot go thru).i think i played little with textures till i found some which was not invisible.And after few days i did export moore buidings and they are all not solid i mean i can go thru them.i understand that i need to create collision proxy but is possible put there some special texture?like asign to my object in sandbox some new texture with some subtextures?also i need to tell that these two first buildings stand on sandbox ground and solid and these other buildings stand only on solid?

textures dont have anything to do with player collision.