unity3d half-life map viewer

Here is my unity3d project, as it is you can open and view half-life bsp files in unity, it loads textures either from the bsp or wads.



I`ve uploaded the source code to this project to github, the part that generates the lightmaps needs a lot of tidying and it seems to be a tad off, the lighting is to bright I think the two textures should be either added or multiplied.

Get it here

https://github.com/thelivewire/unityHalf-life

https://docs.unity3d.com/ScriptReference/Texture2D.PackTextures.html

I was wondering if there is a way to combine all the map textures/lightmap into a single texture (texture atlas) to reduce draw calls, Texture2D.PackTextures seems to work just fine.