export texture issue for sure.
Check out if it is flipped ?
Is some of the RGB channels are inverted ... just check out all the options..
Other thing that appear in my mind are the Uv's ? Are they layed out ? As i see from the prespective i can tell that they are layed out but don't know for sure.
+ Check out the exporter settings. Or try google the export texture problem for the type of exported you are using