Hi, I am using vdb collisions in the source volume in collision mode and I am noticing that it affects the overall emission in the pyro sim as compared to before I used it. My collision geo vdb is intersecting with my emission geometry, but the colliding geo is debris and smaller and the emission is a bit bigger and from another type of geo. I would like the debris just to advect my volume- which it is already doing, but without altering the temperature/density. How can I achieve this?