Explosions

I know two often used techniques:

1: Billboarding, i.e. render a polygon with a sprite on it (animated if it''s an explosion) and transform it so it shows up aligned to the users viewing angle (sorry if it''s a bad explanation, you can read a better on the in the DX7 SDK)

2: Create a textured mesh and animate it to explode (this is what Quake II does)

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Daniel Netz, Sentinel Design
"I'm not stupid, I'm from Sweden" - Unknown

You could probably made it in all blazing nice looking 3d.
With particles and volumetric fog you could achieve that.
(I''m not sure you can use the fog that way...)

Just to add an idea.

-* Sounds, music and story makes the difference between good and great games *-

Hi

There is another good way, which has the advantage, of the good looking Billboards, and of the Volumetric Effect from 3D Mesh Explosions. You can find a Description, and Source Code for this on the Nvidia Developer Page :
http://www.nvidia.com/developer

just look for 3D Demos, and then for Volumetric Explosions.

Lars