Help with SOME units falling through the collider/floor

[kidi0892]

Hello!

I have problem with objects falling through my floor.
Watch it here:

unihelp1

So I spawn some objects and some objects go through the collider.
I have read this article and I am aware that there are issues of this type:

Unity - Manual: Continuous collision detection (CCD)

But. I thought that these issues apply to thin colliders. If I use convex or thick primitives colliders things work okay. I tried all possible combinations with rigidbody settings - collision detections, interpolation etc.

But. I want to have complex terrain with hills and slopes. All terrain engines generate flat plane which they then morph. I thought if I used third party 3D app like blender and make my mesh thick that problem would be solved. Didn’t work.

I haven’t been able to google out any solutions about this problem which I thought to be pretty common OR something is very wrong with my setup.

So, could you point out where I missed something or is there some other approach to collision detection?

My game is some sort of RTS with many agents.

[lightbug14]

@kidi0892

I tried all possible combinations with rigidbody settings - collision detections, interpolation etc.

Continous collision detection should work fine.

@kidi0892

But. I thought that these issues apply to thin colliders. If I use convex or thick primitives colliders things work okay.

The collider in the video is actually infinitely thin like a plane/triangle. Basically, a concave shape is composed of multiple triangles. I believe the physics engine does primitive-v-triangle detection at some point.