.OBJ doesn't export correctly I am new to blender and 3D modeling completely,  I am trying to export a OBJ I created but when I do, certain faces dont show up unless you look at it from a certain angle.

Ive been looking around for a solution but can't seem to find one,  Any help would be greatly appreciated.

Thanks.

Outcome:


In Blender:
I figured out what I did wrong, I had the faces backwards and had to flip them.