FSX/P3D. No doubt this is by far the best looking component of Night Environment I have seen thus far. Personally, I am too caught up in the Orbx products with my 500GB SSD screaming for space as it is. So I just don't have any available space for multiple night light programs. But I am reading the feedback and so far and it all looks very good. Aerosoft has just released Night Environment Germany so head over and check it out!