Transparency sorting and particles

Hi,

I'm facing a very annoying issue when dealing with particles and transparency sorting. I have two effects, an alpha blended cloud and a swirl of particles that moves around the cloud. The swirl is one particle system using another alpha blended shader, meaning that the sorting between the two effects is F***ed : the swirl is either displayed in front or behind the cloud.

This is the actual effect :



And what I want to do :



Anyone having an idea to do this ? Like some kind of masking rendered by a second camera. The scene is quite simple, so any kind of trick will probably work.

Thanks in advance !

 

No, you can't have two or more translucent objects (or particle systems) with intertwined depth sorted perfectly. This is a well-known issue. Your best solution is to change the material of that swirl to opaque