*** update: later I realized this solution has already been posted here: [Suggestion] showing the real issue with the pins going under track ***
Much later on through the lectures I have faced the same issue of the Pins falling through the floor after Renew. I was going through the same procedures as Ben did, just to be left frustrated, as it didn’t work. But even if it did, I felt like it was “patchy”. We were looking under the light for the key all this time: it must be the physics… Well, at least as I finally solved it - it wasn’t!
The strange behavior came from that after we Renew there is a Lower animation. That is, right after the pins are instantiated - whether on the floor a bit above it - we try to lower them through the floor about 40 cm! And that’s why even though I manage to “save” some, others were blown back like trying to drown a ball in the water. When I disabled the Lower animation (and so, the Pin.Lower() action after Renew), suddenly it worked well without any need to rig the physics settings.
