When creating my 3D environment i fist designed my floor plan making it wide enough to include all of my other rooms and assets that i was installing.
After creating my floor i then started to work on my Walls by making them all equal length so there was enough room to fit the assets i was putting in. I then started to duplicate the walls into 8 rooms.
When all of my rooms had been made i then stared to find the assets and textures to put into my environment, I found a horror hospital pack on the asset store that had everything that i needed like hospital beds, doors and stretchers.
When i was putting in the hospital beds i looked at previous images from hospitals to see the layout of he rooms, this is how i decided to include 6 hospital beds in every room.
After i included all of the hospital equipment that was needed i then stared to look at other arena based shooters like quake and unreal tournament to see what type of obstacles they had. I then looked at the asset store and found a pack that was full of ammo and health crates.
Wen finishing off my environment i looked at what other objects were included in quake and unreal tournament and saw that they all had an object that was explosive. After seeing the explosive barrels that were i other games i went onto the asset store and found some explosive gas tanks and some propane tanks, i ten applied these to my finished environment