i would assume this has something to do with your video card being weak, and your cpu is 10 years old.
Sorry I meant 3 dimension. I had FSX several years ago on a slower older computer with a different graphics card and got stunningly realistic (I'm a retired pilot) detail. What I have now is stick figures and little range of motion on the different perspectives. It's for my nephews and they don't need a lot of detail in the beginning, but it sure looks good.