If I create a plane with scale of 2 and tilt it 20 degrees from horizontal then create a sphere with scale of 0.05 and place it just above the top end of the plane and turn on physics, it takes 4 seconds for the ball to roll down the plane and off the end in 5.1. In 5.0.3 the same set up takes 3 seconds for the ball to roll down the plane.
Is this expected? 5.1’s physics appear to be running in molasses.
I went through the entire Unreal Engine 5.1 Update log: Unreal Engine 5.1 Release Notes | Unreal Engine 5.1 Documentation
I was looking for the keyword “Physics” and couldn’t find anything indicating a change. I suggest looking through it yourself as well. There was however a lot of changes, updates and other related improvements to the physics system.
Thanks. I’m waiting for the hot fix to show up on the Mac (it’s available on windows). To be clear, the issue occurs on both Mac and windows between 5.0.3 and 5.1.
Under Physics>Advanced>Inertia Conditioning needs to be UNCHECKED in 5.1. if you do, then the time it takes for the ball to roll off the plane is back to 3 seconds. Once that is unchecked, then Inertia Tensor Scale also works as expected (smaller values result in shorter times to roll down the plane). Haven’t quite figured out what Inertia Tensor Scale is, assuming it’s just a multiplication factor for mR^2 (i.e. 2/5 for a sphere) where m is the mass and R is the radius.