I'm going to paste this here as I've not seen this info in one place, having grabbed it from various tutorials and posts. These are just the KSP specific tags , are there any more we should know about?? Unity Layers Layer 1 TransparentFX Layer 2 Ignore Raycast Layer 4 Water Layer 5 UI Layer 8 PartsList_Icons Layer 9 Atmosphere Layer 10 Scaled Scenery       Notes on lights. If the  lights of your craft  illuminate a planet surface  while you are orbiti