#474 Imaged mapped tubes don't export correctly to obj .

[sim4lin]

When exported to .obj, an imaged mapped tube has the image rotated and a smear is introduced. This is with cylindrical or UV mapping. Exporting to .obj and importing back into AOI shows the defect. I've imported the AOI generated .obj into Anim8or and the result is the same so I assume it's the exporter. The tube is just a simple tube, open on the ends.