For example, I wish to create my first mod as a house/buildings mod. I managed to make a little cave thing with some rusted vault pieces, but I am having a bit trouble with a couple things. First of all, lighting. I don't understand how to do lighting properly, or make bright lights. My lights are very dim, and are hardly emitting any light. I have to scale them up WAY big to even have a ray of light on something. If anybody wants to take a look at my current .esp file and see what I am doing wrong by viewing it in the GECK and additionally in-game as well. I would much appreciate it. Link to .esp Basically the following things are what I struggle with in the GECK: -Lighting (obviously) -Navmeshes -Room Markers / Portals I managed to make the cave type thing out of vault hallways, and attach it to the world. If you want to take a look at what it looks like in-game, you can just throw my .esp in your Data and load it up with NVMM; it works in-game. You access it by a hatch right in front of the Vikki and Vance Casino. Anyways, I would appreciate it if I could get some further help, explanation, or tutorials about Lighting, Navmesh, and Room Markers / Portals; because all of those confuse me in the GECK tutorial wiki. Thanks!