You might not be able to add to the 3ds max ICE but ..
You might not be able to add to the 3ds max ICE but Particle Flow now there is a limited awkward slow nothingness that requires processing
ICE in XSI very powerful, fast, flexible, perfect
Particle Flow in 3ds max limited, slow, not user friendly
You need to work with ICE and Particle Flow to understand the benefits and explain long.
AdminMartin B (Admin, Autodesk) commented
Sorry, I don't understand your request. Could you please clarify?