Billiard balls behave unrealistically upon break.

So, I have this problem, even when I apply a small amount of force, the balls seem to get pushed away easily. Here's how they should behave (GIF from 8 ball pool game):



And here's how I have it :



Rigidbody of balls:



Physics Material of Balls:



Physics Material of Table:



Project Settings:



I tried playing with static friction values for the balls and table, but it doesn't seem to give me realistic results either. Does anyone know what should I do?
Increasing mass doesn't have an effect, I tried it. What seems to have an effect is the drag. Though increasing drag doesn't really produce realistic results, it makes the balls a lot more firm, but then again, increasing drag makes the ball seem like pieces of rough wood.

Note : No script is changing the behaviour of the balls either.

 

Reduce the Bounciness value of the ball material. You may also need to increase the physics solver iterations to keep multiple, successive contacts stable. Use appropriate masses and inertias.

I think the lack of a pressure wave through touching balls will limit your ability to copy this perfectly using PhysX, but I may be wrong.

 

Tried all of those things, nothing seems to make it work. Increasing drag is the only thing that kind of makes the balls more firm, but then they feel like pieces of rough wood (and still not realistic results). And by inertia, do you mean drag? Haven't seen that option yet.
Also, I feel like it's the technical limitation of PhysX too, if I was to write my own system, would I have to completely stop using Rigidbodies, or can I still use Rigidbodies but make changes to their behaviour? Thanks.

 

I don't think PhysX could simulate this properly, at least in the way it's setup within Unity. Collisions rely on rigidbody contacts and penetration. Static contacting balls won't transmit their energy realistically as expected in a billiard game.

 

I've seen several people say the same thing, and I guess it's true that it's the limitation of PhysX engine. However, if I was to overcome this issue, how would I go around doing that? Can you give me some general advice on how to get started? Would I need to make changes via scripts to the behaviour of the rigidbodies of the balls, or would I need to stop using rigidbodies altogether?

 

Personally, for realistic results I wouldn't use Rigidbodies at all. Assuming no balls jumping, it would be a 2D simulation using circles and lines. I don't know how to develop this kind of simulation, but these are some topics I'd start looking at:

• Continuous collision between balls and solid edges, with proper bouncing.
• Transmitting momentum between static contacting balls.
• Angular momentum in contacts and bouncing.