Hi !
I noticed a bug with the hightlight layer and the sprite transparency, if the sprite overlapse the highlight object, the sprite take the color of the layer.
I tried to add the sprite to another renderingId but it was the same !
I attach a screen and a playground ( http://www.babylonjs-playground.com/#1UJAM6 ) to test !
Thanks for the answers !
Hello,
It is unfortunately a known bug as it also exists for particles :-(
The issue is that there is no good fix for it. You can workaround it by using two cameras and placing your sprites in the second one with a layer mask:
http://www.babylonjs-playground.com/#1UJAM6#1
I will think more about it to see what could be done in 2.6.