Softimage|Xsi ............
Volume Cloud
Create>Particles>From sphere and insert the follow parameters:

With th Cloud selected Get>Shaders>Explosion and Modify>Shader to open the shader ppg. Now we're going to change the iD numbers of Sparks,Smoke & Fire. Insert the follow Particle Type ID numbers:

Sparks 1-Smoke 0- Fire 2.

In this way Smoke have the same iD number of particle cloud and it's the only one present in the simulation.
Go to frames 80/90 to start the simulation and now check Freeze Cloud to stop particles.
In the Explosion Shader General tab increase the Ray Steps to 40/50 and copy the follow parameters:

Pay attention that some parameters are influenced by light. Click Here to see a little example.

Lepo

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