umm i have been banging my head in my desk for a week now trying to figure out how to make this type of shading.
i know in the image below they have used particle flow toolkit box 1, but i have absolutely no idea how to make the shading aka the coloring of the particles like that.
i do know that as the particles get denser, the coloring gets more bright like in the picture below.
my request is that if anyone could point me to the right direction on how to get this type of shading.
thnx in advnance and here are few examples



PS: i am talking aobut the bluish things
