I have tried and given up several times on trying to do en blending effect I want. I'm trying to replace the grayscale of particles with a gradient map I made but it just doesn't blend the way I want to. Additive is to bright and the edges aren't correctly transparent, with alpha blend the particles don't blend with each other, and using color over lifetime just doesn't look right at all. It's a combination of alpha blend and additive I'm trying to do but everything I tried hasn't worked. I was thinking having the particles additive blend with themselves and alpha blend with everything else but I haven't been able to find something and I'm starting to think it isn't possible unless I'm just searching the wrong words. Here's an image showing the results of different types of blending I've tried compared to what I want and the gradient map for this example.