   Atmosphere - Haze
  Is there a way to add the glow effect around the atmosphere of a planet without doing the complicated 'atmospheric light scattering' that turns up on google?Looking at the resource from the game I am modding, they have:several spheres from small to large:terraincontinentscloudshazeThe last is textured with a 'haze texture'.The haze texture appears to just be a small image with a color guassian blurred (i think thats the term), fading from one color to another.They use a shader called "planets.fx", unfortunatly I cannot view the shader.So, I am not sure how to go about adding that haze layer.The tex coords are surely off in the import. because it doesn't really look like anything was applied to that sphere except 1 flat color.Here is what thier planet looks likeHere is the texture they use:Like I said, the model is just several layerd spheres, so it isn't worth showing a screen shot.I got the terrain and the clouds down pat. I just need to add that cool haze effect. As it is my atmosphere is too obvious that it is just a largere sphere around the rest of the planet, because there eyes can perceive the transparency between it and the terrain. I think this haze layer would really help.Any ideas on how to do it?   
  It looks almost like they're sampling the texture based on the dot product between the view vector and the normals of the haze sphere. There's probably more to it but I think playing with something along those lines would at least give you a start.   