Physic objects jump into the air when they get close to each other

A problem that can be seen in many simulator games.
Holding one object in their hands, waving it close to another, they jump, shake, sometimes jump far into the air. The whole car can explode into space because we brought a small object close to it. How to deal with such problems?

hi @yuki0okami

If you are referring to a vehicle in general, the physics only need activating once inside the car, or when its moving. So when say the Handbrake is engaged, switch off simulate physics. then reenable when the handbrake is off.

But the physics are not set correctly if a simple touch is all thats needed to blow a vehicle miles away. Make sure the mass is set correctly and the physics are set up properly.

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Its not a simple touch, it happens from time to time, as if for a fraction of a second an object got under the car and the physics went crazy.
Disabling the car’s physics is not a complete solution, the problem is also when we drive over a smaller object, then the physics also often go crazy.

I wonder if it is possible to create a phantom copy for objects with physics, the invisible part would be responsible for physics and the visible part would be a simple mesh that will follow the rotation and location of the invisible object with physics, in this way you could set the smoothness for the visible part in moving , and in a situation where a physical object would jump into space, the script would find out it was too far away and return it to the visible mesh (and is it even feasible for cars?).

it is definatley some sort of physics sensitivity problem, if you look at the sample vehicle or the city car packs, they operate differently. The sample template the car is pretty stable even over bumps, the city sample cars are trickier at speeds and can tip easily.

You need to check your physics and compare them with the samples. Also suspension can help during the driving. but if its something UNDER the car then im guessing the physics bodies are possibly too low? can we see the car physics setup?

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