hi guys, can you explain why box1 is falling down?

You activated gravity with “scene.enablePhysics”

if you change the gravity direction to “new BABYLON.Vector3(0, 9, 0)” each mesh with an imposter will fly up.

box 1 falls through the ground

Not on my chrome browser

Interesting… sometimes works

yes, you are right. this time I had a fall thru, too.

I would change the ground mesh. It has a hight of 0.0001? and use instead a box mesh with a hight of at least 1 so the physics engine has a buffer to detect if a collision occurs.