I want to repaint the A2A F4U-1D to reflect the NAS Glenview paint job on Warbird Heritage Foundation's FG-1D. Each texture consists of two .dds files: one in color and one grey-scale which I assume is a specular (?) file (see attached). My question is, how do you get the grey-scale file to match the color file after you've repainted the color file? If there's a tutorial somewhere pls point me in the right direction.



