Nevermind, I guess I’ve found out all sides of the limitations. I’m just getting into geonodes, so selection of points seems a bit harcore math for me, the problem that for an alembic pointcloud its randomly changes the instance index on the points (if I dont select specific points for a specific instance) seems a blender limitation. The third is that when I selected the first point of the animation and traced it in the viewport while forwarding the timeline, I realized that after a while it starts jumping in the space randomly (maybe somewhere at the collision point). I guess its the gpu simulations limitation, but correct me if Im wrong. All in all, any suggestion is welcome from fellow users, or anyone who has a good idea, how to solve this… 