Having trouble getting consistent Card House behavior. When I make a simple 2-D array of cards, it falls. Trying to find proper settings so that cards will sit properly until impacted.

This setting causes less jitter, and cards don't fall through the base:

Scene -> Rigid Body World -> Steps Per Second = 120

The speed (Scene → Rigid Body World) was at 0.5. When I changed it to 1.0, the cards fall through base. Solver Iterations didn't have effect on card falling behavior

But the cards fall when playing animation (Alt-A).