Edit 1: I changed "city planet" to "city world" to match paradox's naming conventions. I also added influence to the world and toned down the brightness.

Edit 2: I changed the texture of the city world to be more realistic. I hope you all enjoy it.

Edit 3: I fixed some missing text.

Edit 4: I updated the texture again using paradox's night lights as a base. I also gave the planet an atmosphere with clouds.

Edit 5: I managed to get the night-side of the planet to glow like paradox's planets.

Edit 6: I managed to get the whole world to have a glow to it. I think that it looks better this way.

Edit 7, now with more city: This time I managed to get a texture for the day side and lights on the night side. I hope this is better than before. I think it looks quite nice, but please tell me if it is worse or not.

Edit 8, now with more immersion: I managed to add custom tilesets and pictures to the city world, so now you can be immersed in the super-urban lifestyle. This is my first try at this, so it is rather basic.

Edit 9, now with balance: I tried to balance the mod using ideas from the community. So, the city world now is much less overpowered. It gives a 100 % increase to energy and minerals, a 10 % increase to influence, a 300 % increase to research, and a 50 % decrease to food production.

Edit 10: I knocked the cost down from 10,000 energy to 5,000 energy, which seems better to me.

Edit 11: There is now no mineral cost to build, but a 100 % decrease to mineral production to represent all the planet's mines being depleted to create the city.

Edit 12: Fixed to work with the Asimov update.

Edit 13: You can now terraform any habitable world (except Gaia worlds) into a city world. That way any species' homeworld can be an urban wonderland.

Edit 14: You can now urbanize Gaia worlds.

Edit 15, now with more options: You can now select “Sol System with Earth as an Ecumenopolis” to start on Earth as an urban world. P.S. “city worlds” are now called “urban worlds” because I like the sound of that better. Warning: you will be hemorrhaging minerals and food if you start this way, be prepared for a hard start.

Edit 16: I changed the graphics of the tilesets. Now, instead of just being gray versions of the continental tilesets, they are a concrete-like carpeting over the planet. It is supposed to represent an urban superstructure over the entire planet’s surface, like they paved right over everything. This might not be a lot better, but I am not the best artist, so at least it is a little more unique.

Edit 17, now with more smog: I changed the tilesets again in order to look like smog, thanks to mzilli for the idea. I appreciate the feedback that makes my work better. Thank you all.

Edit 18, now with over-population: I added hive worlds. See the above description for more.

Edit 19: I edited the hive world.

Edit 20: I fixed some mistakes on my part.

Edit 21: I made some minor localization edits and some graphical stuff. It should not change much.

Edit 22: Hive worlds now give a 100% decrease to growth time to simulate the high birth rate of an overpopulated world. Thank you to BillBaraka for the idea.

Edit 23: I changed the way the urban worlds look again. I feel that it really improved the looks of my mod.

Edit 24: I added an event that allows one to expand the urban worlds and hive worlds to size 25 with a hit to habitability. This also changes the physical size of the world in question. I do not think that I can fix that, it is a bug in the game itself.

Edit 25, now with food cans: I added in a way to 'trade' food between worlds. Plus, I modified my event from the previous edit so that it works better. Thank you to skud13 for the food trading idea.

Edit 26, now with better science fiction: I have started adding facts to my events to flavor the mod more. One could think of it as semi-hard science fiction.

Edit 27: I changed up the planet graphics again and changed the tilesets.

Edit 28: I had to make many changes in order to become compatible with the Heinlein update.

Edit 29: I changed how the "Random Ecumenopolis" system is created. I am trying to fix graphical issues.

Edit 30: I made sure that there were absolutly no overwritten files in my mod. It should be very mod-friendly now.

Edit 31: I added in a way to terraform with edicts as a workaround for the Heinlein update. Thank you to Garant26 for the idea. I also added in a ringworld edict just for fun.

Edit 32: I changed the way that canneries work and how my terraforming edicts work.

Edit 33: I added orbital arrays for the first time.

Edit 34: I changed how orbital arrays are built.

Edit 35: I added in the ability to build a full-sized ringworld with 12 habitable sections. Thanks to chrs2021 for the idea.

Edit 36: I removed the ability for the ai to start on an urbanized world. I feel that it is better for them to work their way up like the player usually does.