Ok, here’s what I’m looking for: I have sphere with a texture/bump map for mars applied to it.
NOW what I’m looking to do is create the atmosphere… I’ve created a sphere SLIGHTLY larger than the mars globe… what I want to do is create a fresnel effect where the atmosphere is really only visible near the outermost edges of the planet. (for example, close to the globe’s surface, and looking over its horizon, you would be able to see the thin, whispy atmosphere.
I know how to do this fairly easily in 3D Studio Max, but I’m entirely sure how to go about doing this in XSI. Can anyone offer me any tips or tricks?
My basic approach thus far has been to create the globe and apply a lambert material. Now what I’m looking to do is apply a fresnel like transparency map to this material… But I’m not having a whole lot of luck.