When we use BABYLON.GUI.AdvancedDynamicTexture, the HightLightLayer of a mesh is fully colored. I try several things, but nothing.
It just happens when I add this. If you comment, it works normally. :
var advancedTexture = BABYLON.GUI.AdvancedDynamicTexture.CreateFullscreenUI("UI");
https://www.babylonjs-playground.com/#XCPP9Y#576
There is nothing in the documentation that talks about this case, so I guess it's a bug.