Delete alll lights
Put only one infinite light in the scene
The "white" on your texture preview changes as you change the position of the single infinite light.

(Or any other light. Does not HAVE to be an infinite light)

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!