Please forgive me if this has already been covered. I am no PC expert but what happens in the case where, for example, I install all of the Global terain mesh from this: http://www.simviation.com/fsdterrainsrtm.htm which covers the world, and then install other terain mesh from the countless downloads I have. Does it wipe the first one out? Does it have an impact on performance? Does it improve scenery quality? If you can answer any of these questions I am sure I won't be the only person to be thankfull.RegardsPaul

Paul - Anytime one mesh is overlapped by another, the sim will automatically use the one with the higher resolution. There is no performance penalty as only the one mesh is used no matter how many are overlapped in the same area. Doug