Thanks for the input guys ! Besides that, while working on my notes about emitters and doing some more tests I noticed something which is worth making people aware of : the Alien Swarm tools which I use for particle authoring (and maybe even the source SDK in general ?) seem to be conflicting with proper Maya operation. I…
Here are my findings and notes about custom particle effects : http://pioroberson.com/files/Adding%20emitters%20and%20custom%20effects%20to%20Dota2%20cosmetics.pdf Note that on one hand, none of that is officially supported in the Workshop... but on the other hand, Valve has been accepting such items with custom effects…