Since you are building a new engine, I was wondering if there would be more special effects. Particularly, would it be feasible -since this is a gravity simulator as well as more- to create gravitational lensing? You'd have to be no more than X distance from a large body of course.
Another thing that would interest me in effects is: would you have visible heat around celestial objects -like a star-?
My final question about effects is, will we be able to see objects in various light spectrums -from low to high energy-?
I can guess that these would have to be optional as not everybody running this would have a computer to handle all the effects. But it was some ideas I'd love to see. Thanks for taking your time to read this.