Invisible models.(I don't own L4D) However you did build in the content into the bsp

Did you create the appropriate vtx files? I don't think L4D uses dx80.vtx files which garrysmod needs to render models.
(edit I ran the models through a script and it fixed some of them)
You probably need l4d mounted for full compatability, there is no easy way around it.

@ Mally No i didnt, may i should try that in future maps. It also isnt easy 2 grab the models which are needed for the map from a folder what is 3 GB.

For the lighting you need to rebuild the cubemaps ingame in order to remove the pink cheaker overlay on surfaces. Did it before when i ported a map once to gmod, it shoud fix it.

@ Trusted Friend nope this "dont" work with these kind of maps you just need 2 set the command in the desc 2 zero

Occasional Errors floating about. I have every source game except Portal 2 installed. The safe room at the end as two errors on the shelves as well as one in the big Generator room. Not sure what I'm missing.

@ Bart, Hmn okay can you send me 1-2 screenshots? oh and the console spam will befixed soon

I have every left 4 dead map you've made but this, Interior and Rooftop don't show up in my left 4 dead fixed map section.

EDIT: Never mind, I actually found the map, but it was in the left 4 dead 2 section and the icon said "This map is incompatible with garry's mod"

@ Dave, yep sry 4 that the last gmod update messed some things up but i gonna release the first dead center map soon with some updates 2 the l4d one maps

yeah, the map says "This map is incompatible with Garry's Mod"

The walls are glowing pink. How do I fix this?