HI artemis i thing that the best solution is given to you by Jams. I thing that your solution is'nt realistic because you however can see the spherical delimitation of the sphere that you use. instead if you use a plane ( in a similar way of sprite in front of camera...) with an image more deformed (according with the type of atmosfere you imagine) it look more realistic. Try with this solution and thing that in this case a plane use only two triangle and so it is more fast.good work.