I have made a material that seems to work great as a water ripple, the problem is just that when the particle is destroyed, so is the refraction, causing an abrupt effect when the refraction suddenly disappears.
Is there a way to smooth out the refraction? if i use the time parameter in the material, it affacts all particles from that particle system and not just each single particle.
Picture of my material:
Thanks in advance.
You can add a particle color node in material and multiply 1-x and alpha output of particle color. Now in the particle editor you need to add a node color ower lifetime and mske a graph (time =0 and alpha =1; time =0.7 and alpha =1; time=1 and alpha =0). When its done correctly you will have this result : your particle spawns and it has alpha 1 so its refractive. When particle reaches 70% of its lifetime, the refraction starts do dissappear.
Sorry for my bad English.
Thanks a bunch, i completely forgot i could reference the particle color from the material! 
