Solid Meshes are Non Solid Meshes

[LogaN 5]

Simple Problem, my own created meshes are mostly non solid.
Which means I can pass through them and also shoot through them.
I have post this problem in some other forums but it seems that I am the only person on this planet which encounters this problem.

I use 3dMax Rel.3, export to *.ase and import in UT2k3.
It doesnt have to do with the properties of the mesh or the possibillities in the meshbrowser, because I can trigger them in any combination and nothing changes.
I have tried to rebuild this error with simple meshes, but it seems that you need some degree of complexity of the mesh or maybe a special modifier.
My simple caves didnt show this problem, but a statue and a small hut.

If you like, and you think it would be helpfull I can send you the hut or the statue.

Maybe someone has a solution or an idea.
In the last month I get so desperate, so if you have THE solution and you will give me a address you will receive a postcard from Berlin/Germany.
OK, that is not the Nobel Prize, but something near ;-)

greetings

[FBMachine]

I had this problem too. It turned out to be a poly with 0 surface area, ie. a poly that takes up no space. It can happen if say, you duplicate/extrude a face, and you scale the face down, move it to one side, and you don't raise it, so it basically collapses a poly. Wow that was a terrible description, I'll have to post a picture. You really have to hunt these down and delete them, because they make it so they can't cause any collisions ( with players or projectiles, even if you use a collision primitive with it ), and I think it won't even cast a shadow ( since shadows are calculated with collisions... ). So always make sure to delete a poly if you are going to collapse it into an edge. There is no info about this anywhere on UDN, pretty lame that I had to figure this out by myself after hours of hair pulling. Hopefully that'll help.
Dan

[Lord_Simeon]

AaaaaH....so thats it.
Onlt had this once, but had no idea why.

[LogaN 5]

Wow, these two replys are the first answers from people which have encountered this problem too.
I dont know if this is the real solution, also I have no Idea how to find such a surface, but however, enough answer from FBMachine to receive the postcard, if you wish.

[FBMachine]

To find those hiding faces, you could go into face select mode and drag-select edges and see if it selects a face that you can't see... Or if 3DSMax lets you see how many faces you have selected, drag-select around an area, count the number of faces you selected, and see if this number matches how many 3DSMax says you have selected, then you'll know you have a hidden/collapsed face in that area. It's a pain, but I don't know any other way around it, short of re-modeling it with this problem in mind. Don't worry about the postcard, though thanks for the gesture.
Dan