Niagara Collision how to


So the general question here is: how do I setup collision in a niagara emitter.
Based on what I understand CollisionLinearImpulse shouldn’t update Particles.Velocity, Particles.Position or Physics.Force unless there was a collision (Collision.Valid is true).

Still, when I add it (and a Collision Query) to my Particles update stack, the Particles.Position becomes (NaN, NaN, NaN), and so does Particles.Velocity (probably the other way around), and presumably Physics.Force as well. So the question is: how can this happen?

Thanks in advance

Don’t use ‘Collision.Valid’ but rather ‘Particles.HasCollided’. I made the same mistake before I figured it out by looking into the CollisionLinearImpulse more thoroughly.