I have recently repainted the 737-800.
All is good except that the aircraft's shadow is now on the same side that the aircraft's surface is being illuminated by the sunlight.
Example - in the mid day sun when the sun is above the aircraft, underneath the aircraft is illuminated by the sunlight rather than the roof/top.
Is this to do with the DDS file or the way the textures are flipped? Not sure how to correct it as it's a bit annoying.
See if this helps.