Bouncing Cube Problem

Unity Engine
1

I have an actor cube with rigidbody, box collider. I have another cube as a floor with box collider. both cubes have the same physics material (bounciness 1, dynamic friction 0, static friction 0)

Case 1:
Collision detection on rigidbody of the actor cube is discrete.in this case, actor cube falls inside floor cube and bounces higher than it’s initial position. On each bounce, it jumps higher than the previous top position. Going inside the floor cube makes push effect.

Case 2:
Collision detection on rigidbody of the actor cube is continuous. actor cube falls to the edge of floor cube. it bounces lower than the initial position.

are those behaviors normal?

2

this page says;

Bounciness ; How bouncy is the surface? A value of 0 will not bounce. A value of 1 will bounce without any loss of energy, certain approximations are to be expected though that might add small amounts of energy to the simulation.

in my case, it adds more energy. For me, it is not small. After 5 jumps I can see the difference in easy.

Do I do something wrong, or is it a bug?

3

Could you try it with a sphere being dropped? Maybe because the box hits the floor several times it confuses the physics engine