SkyDome + Fog

[kramer]

Hi All,

I want to have nice picturesque clouds in my sky, so I am using a texture mapped sky dome which achieves this nicely.

However, I also want to have the terrain get hazy in the distance, which I can achieve with glFog. The problem is that the fog completly kills the sky dome because of it's distance away.

It occurred to me that one could write a pixel shader which imitated the fog equation but only near the horizon (decreasing as Y increases, thus allowing the beautful clouds on the sky dome texture to show through.)  But before attempting such a shader I wanted to see if anyone else had overcome this problem in a different way.

[darkprophet]

volumetric fog does that nicely. Not sure how easy that is to implement, but it shouldn't be too hard...

[Fool Running]

You should be able to disable fog (and maybe extend your far Z plane) then draw the dome, then setup the fog (and maybe the far Z plane) to draw the terrain.

[kramer]

Ahh, thanks.  that worked nicely