I come here and look for help:
I created my own bisurf files, which work very good:
They must be applied in the Fire Geometry, and here is my question:Density = 10;
rough = 0.6;
dust = 0;
bulletPenetrability = 400;
soundEnviron = "Empty";
isWater = "false";
friction = 0.6;
restitution = 0.3;
impact = "default_Mat";
I made a chain fence, and I would like to create the effect that when you fire through it, then you have the sparks on the chain.

To make this, I created the fire geometry, a simple fire geo, and I applied the Rvmats linking the bisurf file: AI don't shoot through it (because of the FIRE GEO LOD).
But... is there a way that via bisurf file, I can make the Ai understand that the Fire GEO LOD is penetrable? So that it can shoot through it?