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I have a object that moving by adding force to rigidbody. With just big flat plane, it works fine but with connected small planes, sometimes(actually not sometimes, a lot) the object bouncing off or rotating to another direction where the planes are met. Planes are placed well, there's no gaps between the planes.

Here's the picture for understanding: enter image description here

Now next image shows that object was rotated in left direction(I was just keep pressing forward and it just keep push forward).

enter image description here

I tried with more mass values, like 30000-50000, still happens. I don't know why this is happening, where should I check to solve this problem?

Any advice will very appreciate it.

P.S. I forgot to mention it, object using Box Collider.

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  • \$\begingroup\$ What collider type is the car? If it’s a box then its edges might get stuck between the planes. Try changing the car into a sphere or a convex shape with less sharp edges. \$\endgroup\$ – schteppe Jul 29 '18 at 17:10
  • \$\begingroup\$ @schteppe I used Box collider. Using mesh collider(convex) makes object super jitter, and using capsule/sphere collider makes object hard to control, it just keep rotating and slippery, even I locked the rotation. \$\endgroup\$ – modernator Jul 30 '18 at 3:12

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