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DigitalBlur

Fogmaps?

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DigitalBlur    122
Hi, I''ve been reading a lot of info about volumetric fog and how to calculate it. I understand how it works with just verex fogging but there is VERY limited info about using fogmaps. As i understand it they create a grid of points accross a surface, but I still can''t seem to get my head around how this is implimented... Any help would be appreciated, thanks

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Guest Anonymous Poster   
Guest Anonymous Poster
It like lightmapping, but instead of storing lighting values in the texture, you store fog values that are raytraced in realtime. The fogmap textures are applied just as lightmap textures are.

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DigitalBlur    122
Thanks for the reply, but do you know any sites that have information about using fogmaps? I''ve tried searching the net but the closest i''ve found is subdividing the geometry and using the vertices?

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