#This is obosolete after https://github.com/urho3d/Urho3D/commit/861a85fb1f5adbd82b1a3ba8160bad5b6fcc0da4
#Urho3D Soft Particles
License: Public Domain
http://urho3d.prophpbb.com/topic1611.html
There is two implementations: in MyData and in Data (by MonkeyFirst)
Discussion: 1vanK#3
For big sprites you need decrease DepthDiffMult in material.