How radial damage only affect specific depths

I have a wall - that i want to hit and then i need chunk to fall off - and that chunk should only break when they hit the ground.

I saw very little info on this on the internet.

I have setup Nvidia Physx lab DM mesh - with 4 depths - and now i just need to break loose chunks from the first 3 depths - and then the 4. depth should only break when hitting the ground. (the goal is that i need some particle effect to emit only when each chunk hits the ground.)

So i think i need to figure out how to make a radial damage force or similar - only affect specific depth?

Any suggestions are very welcome :slight_smile:

anyone have any ideas ? :slight_smile: i could really use any suggestions.

Hoping very much for any answer