by BrandonF » Tue Jul 19, 2011 1:48 pm
He wants to know how to convert the textures, not if if they are compatible. While BMPs will work, DDS is better in FSX.
Simply open the textures in DXTBmp, flip the image and alpha by clicking "Image" in the menubar, and save as a DDS DXT5. (DDS 888-8 32 bit if the texture is for glass or something transparent) Delete the BMP textures once all the DDS textures have been saved.
If you are having visual issues (black glass, non-transparent parts that should be transparent, etc) then there is another fix that can probably help.