Unity 5 Mesh collider issue

Unity Engine
1

Hello,

I have updated my game to unity 5 (Unity 5.1.0f3).

For some of my players (around 5%), when they join a map for the first time, they can go through a wall or they fall through the floor (only 1 or 2 game object are affected and on all maps that i have).

I was able to reproduce the same in the editor by playing my game but only one time, i explain :

When i was able to go through a wall, i have checked the game object (wall) and everything was fine on it, it have a mesh collider and when i select it, i can see the green line of the collider.

So i have tested to add a second mesh collider and then i was not able to go through a wall anymore, sound like the mesh collider loaded first was badly loaded or i don’t know.

Another thing, if i leave the map and join it again, this bug do not happen again (it’s why it’s hard to reproduce).

I have never got this bug in unity 4.x.x

If an unity staff can check it.

Thank you.

2

@roka
If you are using one of the character controllers provided by Unity’s standard assets:
Have you tried using Unity 5.2 for your project?
Because I had issues using the character controller in scenes that used mesh colliders, too, and the problems were resolved in 5.2.

3

Hello and thank for your answer.
Unfortunately the version 5.2 is broken also in a few other thing. Just check that to understand :

When a problem is solved, 2 new appear.

Thank you

4

In the 5.1.2 release note i can see :

  • (685107) - Physics: Fixed an issue in PhysX where a capsule would fail to collide with a triangle mesh.
  • (441764) - Physics: Fixed an issue in PhysX where capsule-capsule collision detection would erroneously fail when the capsules’ axes were almost aligned.

Maybe because of that, not sure.