Well it's supposed to be an area that was under construction then one day just stopped. I don't know exactly how else I'd be capable of making it look that way.
Make the concrete not flat but make it have little bumps. These bumps show that the concrete at the incomplete areas wasnt finished yet. Using that trick you can actualy make some of the wooden parts go underneath the concrete showing that the concrete went over the wood.
However, technicaly thats still an odd thing to do since usualy they use metal for that since the wooden parts can still rot easily in concrete (since concrete is wet and thats not good for wood, and although metal does rust its easier to protect that against it). (or whatever other reasons, anyway i have never seen wood being used that way)
But look how pretty it looks
Detail shouldnt distact the players and also help in the gameflow. At those areas i cant realy tell if they are able to walk on the areas of screen 1 and 3. If they can walk it should be more clear yet at the same time, if they cant walk it also should be clear. Although 1 rocket jump can be enough to find out, im sure that many arent just going to be soldier to find that out.
This means if it can be reached that people initialy wont know it can be used, or if it cant be reached, people would still pay attention since they dont know if someone would go there.
Only on the 2nd screen its clear enough and to me that area is nicely detailed.