As accurate as possible. I load up RE2 and take loads of screenshots. I put a grid overlay on the map so its to scale ish. Locked doors will be labeled/colored and unlocked when finding the appropriate key/trigger. Some safes will have codes (will have to test if this can be applied on POI)
I will also work on the exterior, but I dont think theres much reference to go on.
I should be able to just update the build with future updates, no?