I am new to repainting in X-Plane, but have been repainting in the FS series for years. With many FS and P3d paints, you have a .SPEC file that allows you to apply specular effects. These are very common with many of the Carenado variants. Now, I am trying to do a paint in XP-11 that would, if I was in FS/P3d, use the .spec files for a specific highlight color. How are these effects handled in XP with the .PNG files?