This mod changes the Planet Classes file... I'll have to fix that.
I havent messed with this game since Distant Star's announcement... I'll try to get an update out soon!

never seen an animated one, not really a big deal to add in anything like that. Just makes the place look like there is stuff going on, rather than an abandoned city.

Also, you mentioned adding flying vehicles to give it more life?
Do you know if it is possible to animate them so that they move?
I thought about this, but decided to not add them because it would be strange to have flying vehicles with no momentum or velocity...

I play them as well. The best game series I have ever seen!
I do wish the Citadel was in-game, but I do not know how to any of the modeling...
I figured that these Rings are the best we have for now.

That image is of the citadel, present in all 3 Mass Effect games, which I still play to this day so I do know what you're talking about. An idea you just brought to mind is the ability to add in the citadel itself into the game as a custom 3D asset to a possible unique starting system, which would be pretty high tier

The buildings being the same color is intended. My goal was to make it look as if the buildings are built directly into the structure of the Ring. A good example is this image:
https://vignette.wikia.nocookie.net/masseffect/images/d/d7/MassEffect2Citadel.jpg/revision/latest?cb=20100721191415
All of those buildings are actually part of the same structure. Notice how they all have the same style?
This city-set is also intended specifically for the Artificial RingWorld environment image. It is best used alongside a mod that allows colonization of them at the start of the game.
As for different cities...
I do plan to make many more cities, of many different styles. I plan to make some with different architecture, as well as several versions of each of them with different colors.
Feel free to make any suggestions.
Thank you for the feedback!

also a pretty new idea would be to add different colors to the different buildings. Just realized that on every cityset Ive seen to date has all the buildings 1 color. Why are they all white, or all tan. or all gold? Look at a city irl and their is variety in the buildings. I jus find it hard to imagine there being a law requiring all buildings look the same. Also since Im on the subject, why not add in some flying vehicles to give it more life, only seen 2 sets before with flying stuff on them and I think its a pretty dank thing to have

I cant even find the other mod I was talking about, easier solution is a less dense cityset that still looks overpopulated af but doesnt funny on non-ring planets

What I mean is that currently you have to equip the cityset, which effects all of your colonized planets

You mean to add a cityset in the main image do that it shows up before colonization?
If so, I am not sure how to do so and still make it look right. I plan to make multiple citysets with different styles, and I would have to create an entirely new environment for each one...

What do you mean by "without forcing all other planets to look like they were designed to be rings"?

would like to see the city set automatically show up on the ring without forcing all other planets to look like they were designed to be rings, I'm not a modder but i saw another mod with a encrumbopulous (however you spell that) planet that had a city set burned into the wide picture without selecting it, perhaps it is printed over your city choice idk but that would be pretty cool, as currently the fallen empires dont have the city set selected so the ring skin doesnt look as nice