Problem Importing Blender Models To UDK

[Bubba17583]

Alright, this is my first time posting here, so forgive me if this isn't where i should be posting this sort of problem.
Anyway, Im having a problem when I import my Blender models to UDK. I am importing in an FBX file format, and when i import it, half of the model doesnt show up

Here's the front of the model:
http://imgur.com/Np8zh8h

And here's the back of the model:
http://imgur.com/vsn3YEs

As you can see, the front shows up fine, but the back is completely transparent. Anyone else having this issue, or know of a potential fix?
Thanks

[smokey13]

it looks like your normal are flipped the wrong way, go into edit mode select all and press the "recalculate" button.

[Bubba17583]

Hmm, that just flipped the problem. Now the top is transparent and the bottom is solid

[smokey13]

that usually means your faces are pointing inwards instead of outwards, try doing the same but hit the "flip" button.

[Bubba17583]

nope, same thing. sorry this is being such a pain

[fighter5347]

could you upload the blend file somewhere so that we can take a look at it?

[smokey13]

ok, in edit mode open the properties window, scroll down to the "mesh display" section, near the bottom of it there is a button that has a cube with a highlighted face, press it and change the size to 5, a load of little lines will show you what way the faces are pointing, they need to all be pointing out.

[Bubba17583]

Fighter5347 heres a copy of it http://www.mediafire.com/?psdeq3o1v13lb65
The model thats having the issue is in the 2nd layer

and Smokey, they all appear to be pointing out. Maybe it's not a problem with the normals?

[fighter5347]

I think the problem is that the mesh is build from a one side polygons. I will try to find a solution

[smokey13]

I think the problem is that the mesh is build from a one side polygons. I will try to find a solution

yep, in your material in UDK check the "two sided" box and then it should show both sides.

[mAlkAv!An]

No normal issue, this is how polygons work in general. They are one-sided per definition, the backside is not visible. You can do it the lazy way and apply a two sided material but this has its drawbacks as well.

[fighter5347]

yep, in your material in UDK check the "two sided" box and then it should show both sides.

I have tested it out and it works, just try it out Bubba

[Bubba17583]

worked like a charm, you guys are awesome!
thanks for the help!

[smokey13]

They are one-sided per definition, the backside is not visible.

mAlkAv!An's right, although it looked like a closed mesh that's why I thought your mesh had flipped normals, anyway glad you sorted it