This is a small Editor utility I created for testing out particles in Unity. It's a big hassle (in my opinion) to go back'n'forth from Unity to an image processing application to just slightly tweak ...
_TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5) _MainTex ("Particle Texture", 2D) = "white" {} _InvFade ("Soft Particles Factor", Range(0.01,3.0)) = 1.0 ...