could there be an option to make a grid that...well.....doesn't really disperse....a permanent grid i guess....call me lazy if u wish but i find it a mild inconvenience to have to erase dust (to erase grid particles that have dispersed all over) and make a new grid when watching acceleration/velocity.....
also an option to make a grid that shows in 2d or 3d space-time and the effects mass has on it...that would be kinda cool...to see a large steep distortion in space-time where a BH is located...or to see the depression the sun makes that keeps all the other objects in orbit around it...
just suggestions.....good bad n/a?