Emitting Particles From Boolean Surface

[kiloran]

What's the workflow for animated a boolean and having particles emit just from the surface being cut away? I see it mentioned a fair amount but can't find a tut anywhere

Oh, and this is going to happen right up in the camera for this shot, so faking it with the transparency ramp trick is going to be difficult if not impossible.

[gmask]

what type of effect is this.. laser cutting through something? You might beable to convert lines to surface curves and do a loft to create a separate object to emit from.

[kiloran]

It's a rock being weathered by wind (sped up) the exterior and interior surfaces have very detailed textures and what I really want is the interior surface to emit particles from its vertices as it's revealed. I've seen the effect done before...I'm just not sure which nodes I have to connect in the hypergraph to emit just from the new surface.