Why is this model buggy in game?

#1 Yeah - looks the normals are flipped so you're actually viewing the backside of the far faces - if that makes any sense.

What you need to do is filp the normals on the mesh and re-export. If that doesn't solve the problem, it should tell you a bit more about what the issue really is.

#2 Hi Kirby.
I actually already tried that and it didn't help. (All the normals seem to be pointing away from the model's centre)

Any other ideas? Thanks.

#3 Had this problem a couple of times, it usually fixes itself if you re-calculate the normals, if it doesn't there is probably a face somewhere "inside" the modell that mess things up, go through the mesh and look for faces that cant be seen from the outside and delete them, that should fix it :]

#4 Hey, thanks for the tips Jove.

I tried Re-calculating the normals but it didn't help.
Now I'm trying to look for those faces from inside but can't see any...
I also tried removing doubles but there was none.

Oh and the model has "Double sided" on by default and I exported the model with all the faces double sided and not double sided, but there didn't seem to be any difference.

If you are interested here is the link to the original model

There is actualy four models in the scene but I just deleted three of them.

Well I'll keep looking for those extra faces.

Thanks for help!

#5 Wow looks like it works now, though I'm not sure what I did... First I noticed some missing faces but adding them didn't fix it. Then I started to mess with the armature and next time I viewed it in the show tool it rendered correctly.

#6 @Jari: Yeah, missing faces seems about right, you need the mesh to be without "leaks" for the normals to calculate corectly :]