Would be really cool if you could enter the large building in the thumbnail

there should be a playlist on his channel somewhere

for learning mapping, i'd recommend the tutorials this guy did a while back
https://www.youtube.com/@3kliksphilip
hammer and source have been around for a while, so there should be tutorials for basically anything you need to do :)

Any tips for making maps for Gmod? I want to start making mods n stuff, but I have literally no idea where to even start.

welcome to Gary, Indiana

My one complaint is this is called Grunge but where is Nirvana and Alice In Chains and Pearl Jam? Or sound garden and superheaven?

how big is the map

In 1988, the crime rate in the United States rises four hundred percent. The once great city of New York becomes the one maximum security prison for the entire country. A fifty-foot containment wall is erected along the New Jersey shoreline, across the Harlem River, and down along the Brooklyn shoreline. It completely surrounds Manhattan Island. All bridges and waterways are mined. The United States Police Force, like an army, is encamped around the island. There are no guards inside the prison, only prisoners and the worlds they have made. The rules are simple: once you go in, you don't come out.

ye right, that makes more sense, most first maps released on the workshop have no light_environment and usually don't have much in them

it isn't the "first" map i've made, just the first map i've released

for a first map this is impressive