I’ve got two marbles both set up with a collision and are Active, and a torus and 2 planes set up with a Passive.
One marble sits within the circle of the torus, which is half buried in a flat plain, while the other is a the top of a sloped plain.
The second rolls down the plain it’s on and bounces into the circle knocking the first marble over and out while staying inside the circle itself.
However whenever a go to animate it the first marble begins to float about halfway up the unburied part of the torus and seems to be rotating. The second marble starts above the sloped plain and rolls down it without ever touching it, and falls towards the flat plain hits into it a 1/4 of it’s mass before bouncing back out and hovering at half the height of the other, upon contact with the first, spinning marble, the second also begins to spin. Though, that’s to be expected. Both then roll to the torus, the first going over while the second stays within. Both do not touch the torus.
I’m uploading 2 pictures which are the first and third frames showing the marble rising, as well as the .blend if people want to have a look at it.
Thanks for any help, and if you need anything else I’ll be watching this fairly often as the day/week/year goes on.
marbles why.blend (2.13 MB)