1. Download this, Tore.cnc-comm.com and extract/copy all the files in that .zip to your Tiberian Sun folder, Lumix, Rotd ect.
2. Right click the main .exe that runs the game and click propeties then compatibility tab then tick the "Reduced Colour Mode" then click the dropdown box and select 16 Bit.
This works with Tiberian sun and all the mods affiliated with the game.