First is with xlodgen output (around 3gb after installation), 2nd is with Perfect Terrain LOD mod (around 280mb). xlodgen lod is generated according to STEP guide. What do you think? IMO, perfect terrain lod is better, more details (click on the image to bring full size), better blending with majestic mountains, despite much smaller size. TBH, I also compared xlodgen output with vanilla and the quality is not that much different. Maybe xlodgen textures are not showing up in game for some reasons?