I’m sure that there is some impact, but it still seems [X-Enviro] smooth on my system (i7 9800X, 32 Gb RAM, RTX 2080Ti). The only negative is that it does funky things in VR. So, if I am going to fly in VR I use Active Sky and Ultra-Weather which work and look great together. X-Enviro looks great on a monitor though and seems to be on the right track again…