If you don't click save then it's not modifying the file on the harddrive. It just copies it into memory."Let me help you out. You're cleared to taxi any way you can to any runway you see."

Thanks!Peter Sydney Australia

>> Er, the "reflection map" IS the alpha channel of the texture map...But only on planesYou have to do something tricky with scenery.>> .and the "transparency map" or "light map" REQUIRE{/b] the alpha >> channel to control which electrical buss is used, so yes, >> it makes a LOT of difference!"Electrical buss" in Scenery ???

>>> Er, the "reflection map" IS the alpha channel of the>texture map...>>But only on planes>You have to do something tricky with scenery.>>>> .and the "transparency map" or "light map" REQUIRE the>alpha> >> channel to control which electrical buss is used, so yes,>>>> it makes a LOT of difference!>>"Electrical buss" in Scenery ???I'm an aircraft developer, so I responded the OP's question - which was not limited in scope to scenery only - from the POV of aircraft textures.Certainly scenery uses a slightly different approach, yet the alpha channel persists as a requirement, even when using xxx_LM.bmp images for lightmasking.