I have this great particle engine going where I can set colors for the sprites to fade into and pos, vel, and acc vectors for each particle with random behavior additions and full system vectors as well to provide for moving systems (ie a fire sweeping through a forest) but for some reason when I turn on fog I see the particles as little boxes (the bitmap of each) with the fog color in the bg of each particle. Anybody know what is going on and how I can fix it? I am using Managed DirectX 9 and C# to program it.

Be sure to render the particles at last.

Regards,
VizOne