PixelPerfection

Hi I am using SVAL to create my avatar with skeleton. When i bring it into to secondlife the 3 different pieces (head, upper and lower) parts have unmatching shading/lighting or something in certain lights. With other windlight settings it looks fine. Im using max 2014 with the recommended fbx plugin and correct license version of the slav. Any help would be so greatly appreciated. Its driving me crazy.