I have a very basic setup of a cube as a floor, and a niagara upwardmesh burst system configured to look like coins bursting and falling to ground. they work fine, hit the ground and bounce around before settling. I can use this setup in many different levels and I have already. I’m working on a new level that has a bunch of stuff already, I add the coin burst niagara and it falls through every mesh i put in its way. I also have another niagara system for bullets that have impact vfx when the bullet collides with the wall. again this works in every level i can try it in, ones ive made, ones ive downloaded from market. then i try it in my current level i am working on and the bullets just go through the walls. its as if niagara collision isnt working in this level that i need it to. but I have not done anything different setting this level up than my previous levels. collision is enabled, ive checked all the meshes, I can copy paste the cube floor and niagaras to a new blank level and they just work the coins hit the ground, the bullets impact the walls. but in my main level the same exact setups are not colliding. same meshes same niagaras…im lost.