Here is an interesting capture of Microsoft Flight Simulator (FS4b) running with a custom built aircraft, name: Octo-4b. This A/C was modeled after the Russian Beagle (IL-28). The Aircraft Adventure Factory (an add-on for FS4) let you build your own planes for use or sharing with FS4! You can also build your own scenery with previous add-ons (without much of a learning curve to do either).
The AVI DOSBox capture is a bit choppy, but FS4 runs okay in DOSBox, though not as good as in good old MS DOS 6.22 or PC DOS 7.0 on a 486DX2-66! Better performance of FS4 in DOSBox requires a faster system. Footage here was shot at the virtual Livermore Muni Airport (LVK), and above the Livermore Valley (east of the San Francisco
Bay Area). Custom Scenery for this area is active...