Thank you for the helpful information.
Does collision evaluation while moving happen for everything, without exception?
The complex collision I’m currently using is attached to the root component with no rendering. It’s not simulating anything and does nothing other than detect only single channel. Will this still affect performance?
And, if the number of polygons is exactly the same, is there any difference between simple collision and complex collision? Apparently complex collision may be required to do what I want, and I’ll need to enable complex collision even with few polygons.