I’m fairly sure I’ve UV’d all the surfaces correctly, using grids and ensuring there’s at least 3 pixels separating the islands on the second lightmap channel. Lightmap resolutions are fairly low but appear to be correct:
Ya know, I’ve NEVER understood the lightmap density. Anywho, are all of your walls different models or is the whole layout one model? They look like they are 3d boxes, so that’s good. Here’s one thing I learned with unwrapping: With a wall, you have two faces, the front and the back. Then, you have the four sides. Do not connect any of the four sides to the front or back faces when you UV unwrap. Here’s why, the top and bottom face will have contact with the floor and ceiling. If they are attached to the front or back face, that shadow that is created from the contact of the top and and bottom face will bleed onto the front and back face. So in short, when you unwrap, there should be 3 islands: Front, Back, the four edge pieces connected.
