Hi all I want to create a box (or a mesh) which should be open from top side. I will use it to drop items into it using a physics engine such as cannon.js For example the physics applied to the box will be box .setPhysicsState(BABYLON.PhysicsEngine.BoxImpostor, {mass:0, friction:0.5, restitution: 0.4}); The items dropped into the box will use physics items.setPhysicsState(BABYLON.PhysicsEngine.BoxImpostor, { mass: 1 });