I was working on an old prison before never used it so I might remodel it and sell it! I need some improvement ideas! If you wanna check the game out use the link bellow!
I do agree with the others, the orange is a bit too bright for a prison. The bright blue spawnpoints also look a bit out of place, apart from that, it looks great!
While there is small structures and little details. Do you mind explaining the specific theme your going for? The dark orange color doesn’t look fitting if your going for s old prison I would try to add other appealing colors and materials to certain areas of the build.
Whatever style your wanting to achieve the build should incorporate it.
If it’s meant to be a more old version of pristine used to look like perhaps add some cells with grey-ish materials and probably adding some electric wires on the border of the walls. You can take that suggestion however you like.
Have you consider gathering reference images of what your wanting in your prison, smaller details can add a more good appearance to the current design! Always experiment instill you get something that you like, (the build still looks like a work in progress so i’m assuming it may be a reason why areas lack details).