Obstacle Course lesson - dropped obstacle going through ground plane

[fonduecat]

I’m currently going through the 3D course for game development in Unity and am just stuck.

I’m in the lesson where we are creating an obstacle course and creating an obstacle that drops from a height after a certain amount of time.

My problem is that this obstacle just falls straight through the ground plane and disappears. The only thing I found that worked was to add a box collider to the ground plane, but this just made the obstacle jump around and triggered the collision on the walls. There is a mesh collider but it doesn’t seem to stop the falling obstacle. I’m wondering if I missed a setting somewhere. I’ve been going back through and checking all my settings but no luck so far. Hoping someone can help. Thanks!

[fonduecat]

Hopefully it helps, here are the current settings for the obstacle (dropper) and the ground plane-

[bixarrio]

Remove the rigidbody from the ground plane. It doesn’t need it. The rest should be ok. Be aware that the dropper is using physics so if it hits something at an angle it will rotate and start bouncing around. The way it is in your screenshots it should be fine, as long as there’s nothing underneath it. I think you can increase the mass if it bounces around anyway

[fonduecat]

Thanks! I think that did it, much appreciated!