I know you submitted this map a long time ago, TUD, and I know I should have responded a long time ago, but the version I played could greatly benefit from some more tweaking.
There were a few glaring problems that made me wonder whether you'd tested it in any port other than zdoom, and the aesthetics, gameplay and maybe even the layout could use some refinement.
I last looked at the map months ago, but I remember enough about it to give a considerable amount of feedback.
- The map is split into what seems like 3 or 4 areas. We have the outdoors part, the techbase, the corrupted techbase, and the dark area with the huge towers/temple. My problem with this was that the level lacked cohesiveness - it felt more like playing several different tiny maps than one. This was because instead of transitioning from one theme to another, the map seemed to be made up of wholly separated areas which you would usually access via a teleporter. Cutting down the number of teleporters where possible could make the map feel more connected. When you do teleport, it's best if you arrive at an area you've seen from an earlier part of the level, instead of one that's completely new (which is fine, but only in small amounts).
- The bright lights were out of place here. It almost looked like a disco at times - not the kind of atmosphere you were going for, I'll wager. Try reducing the number of different colours you use for light textures, use 2 or 3 and don't mix them up too much in one area.
- A problem I have with a lot of your maps is that they tend to look dull because of the overuse of square and rectangular sectors. When you do use other shapes (like that semicircular room you teleport into just past the first area) you tend not to use enough lines so they look messy. Adding more vertices and smoothing out some edges in some places would help. I also think you use SHAWN too much. It's a dull and monotonous texture that should be used extremely sparingly.
- Another problem I have with your maps is you tend to overuse big monsters and they tend to involve a lot of BFG spam. Both features very much in evidence here. Try to add more lighter monsters instead of layers of barons, mancubi, arachs, archies, etc. At the moment the map is full of rather boring fights where you pump rockets into small groups of big monsters 'til they die. Also, the traps are predictable.
Having made some general points, I'm now going to link to some screenshots which will enable me to make more specific points...
Just a few of the many obvious texture misalignments to be found throughout the map.
Not sure entirely why, but these HOMs seem to be spread out on what look like consoles and other objects throughout the map. If I was going to take a guess, I'd say that you probably used new textures that work in zdoom. I was testing in prboom-plus, however.
That red light flat for the ceiling is a poor choice, by the way. It should be used in a relatively small light fixture, not to cover an entire segment of ceiling in some corridor. Bad texture choices like this were common on ceiling flats throughout the map.
One does not expect what looks to be organic matter to be so rectangular and ... well, regular in shape. I think you've overdone it with that organic texture as well. Far too little variety in this area w.r.t textures, though it is probably the best detailed segment of the map.
Bright green lights look out of place, especially the floor lights.
Some surfaces look like they haven't been rendered :/
This is another good example of the overt blockiness of the map. Even the pipe is a rectangle. The vines were a nice touch, though.
I'd like to see more lighting of this quality throughout the level, this was really good.
I hope you see what I mean about the lights :/
I'm not too sure I like the hell sprites in this techbase either.
Didn't like the yellow light fixtures here, and extremely thick doors are something I tend to associate with inexperienced mappers.
An actual pit below would work a lot better here than what appears to be black buildings that look like pits in most places :/
This is one of the prettiest rooms in the map, but I still feel it's too squareish. Look at the blood fountain for example. There is a HUGE gameplay issue here, by the way. You'll see it if you look closely :D
That's right, the cyberdemon actually got stuck in the floor for some bizarre reason. I think that the player can fall down there too, but you'll need to use cheats if you want to get out. Fear the might of the illusio-pit, I guess.
The hanging body sprites will block your way in limit-removing ports, so consider placing them somewhere the player can't go anyway.
Did you actually forget to connect these two sectors together with a door? :P
I seem to recall having to idclip through to get further.
The map is another good illustration of how blocky this map is.
In summary, not bad, but it still needs a lot of work, I think. I'll be happy to look at it again once you've ironed out some of the kinks. As always, the bugs take priority. Comments on aesthetics and gameplay are my own subjective opinion, so feel free to ignore. But I think you might find that many players may agree with most of my points.
EDIT: This thread has been bumped to page one for the first time in a while. I bet that was unexpected :P