I have a background scene. And my game should run in front of this background scene. The background scene has a day night cycle. So i need a independand lighting for my game so that i can play the game in the night time cycle too. I use two cameras to display the content. The objects are in corresponding layers. gamecontent and levelcontent. The directional light for the level content has the layer gamecontent turned off in the culling mask. The directional light for the game has the layer levelcontent turned off in the culling mask. So the game light should not affect the background scene. And the level light should not affect the game in the foreground. But they do :/ The light from the game lights the background scene, and the light from the background scene influences the game. Not so strong as if the culling masks would be ticked, but very visibly. Scene shows the background with game light on and off. It's quite a difference. Is this a bug? Or is there a trick to light my content really independant?