What Virtuali is saying is correct; however, this developer has created a conversion tool (GET IT HERE: Addon Converter X v1.03
) which will convertor textures from DX9 formats to use in DX10 and its got a trailware version for you to test before you buy. I own it and it works 100% for Aircraft but, for sceneries there are limitations. My only suggestion is to try it for LSGG and/or the others. I've switched back to DX9 now for a long time (due to many of my addon Airports being only DX9 capable) and don't remember if I did this for LSGG or not. So, it won't hurt you to try it if you are "Gun-ho" on sticking with DX10.