need help with "Mesh Maker"

[Anonymous]

I am using the program meshmaker. i can make a useless decoration, but when i try to create something else out of it (such as loot or an objective item) i cant see it. i can pick it up and i can see the geometry of the object in the 2d windows, but it will be invisible in the game and in the 3d window. i even tried matching the exact properties of my new loot and the useless deco.