Blender Glass problem

[FluffCycle]

Hey guys. hopefully you can help me out with my problem. I have modeled a glass in Blender but when I export it into UDK it doesn't look good. Well, it looks like this:


I created a material in UDK to give it some type of transparency, but even then it still has weird artifacts all over the wine glass:


I'm fairly new to all of this guys so if you know, what on earth am I doing wrong? Thanks in advance!

[mAlkAv!An]

Normals are flipped. In Blender select all faces and use 'Recalculate Normals' (CTRL+N). Toggle 'Backface Culling' in the properties panel (->Display) to get a preview of what it looks like in unreal or another game engine. If it's still faulty you can flip single faces manually.