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SC4 Modding - Open Discussion

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General SimCity 4 modding discussions, experiments, make requests and ask for help here.

2,845 topics in this forum

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Post Modding Requests Here
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- 51
By Tropod, August 11, 2004
- simcity 4
- modding
- (and 1 more)
  Tagged with:
  
  simcity 4
  
  modding
  
  requests
- 1,525 Replies
- 91,766 Views
- justforfun
- June 22
[sc4pac] Let's write our own package manager
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- 2
- 3
- 4
- 11
By memo, October 22, 2023
- simcity 4
- sc4pac
- 319 Replies
- 22,014 Views
- nos.17
- June 24
How to: Make your own Mods
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- 4
- 10
By funforfree99, May 26, 2003
- sc4
- modding
- (and 2 more)
  Tagged with:
  
  sc4
  
  modding
  
  mods
  
  reader
- 290 Replies
- 59,150 Views
- Rj Simas
- July 25, 2025
Game framework compatible DLL loading (and other modding discoveries)
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- 4
By simmaster07, May 16, 2016
- loadable
- dll
- (and 1 more)
  Tagged with:
  
  loadable
  
  dll
  
  modding
- 111 Replies
- 18,614 Views
- Propfam
- Monday at 11:03 AM
How to: Ilives Reader, Beginners Guide
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- 4
By Tropod, July 10, 2003
- ilive
- reader
- 90 Replies
- 52,513 Views
- nic49548
- July 21, 2024
The Future of SC4 Modding: The Matter of Digital vs. Disc, and Windows vs. macOS in the DLL Era
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- 2
- 3
By Tarkus, February 14, 2024
- simcity 4
- dll
- (and 9 more)
  Tagged with:
  
  simcity 4
  
  dll
  
  modding
  
  mac
  
  windows
  
  NAM
  
  CAM
  
  digital
  
  disc
  
  safedisc
  
  sc4macinjector
- 81 Replies
- 43,256 Views
- Null 45
- July 18, 2024
SC4Fix: third-party patches for SC4
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- 2
- 3
By simmaster07, December 25, 2015
- experimental
- crash
- (and 3 more)
  Tagged with:
  
  experimental
  
  crash
  
  ctd
  
  sc4
  
  patch
- 81 Replies
- 19,784 Views
- Haljackey
- July 26, 2025
Building Styles Master IID
- 1
- 2
By Ulisse Wolf, July 9, 2024
- simcity 4
- building style
- (and 1 more)
  Tagged with:
  
  simcity 4
  
  building style
  
  iid range
- 50 Replies
- 5,188 Views
- Lab Rat
- February 6
SimCity 4 Open Access: Repository of modding tools
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- 2
By Ulisse Wolf, January 8, 2023
- simcity 4
- modding
- (and 5 more)
  Tagged with:
  
  simcity 4
  
  modding
  
  coding
  
  tools
  
  programs
  
  index
  
  list
- 46 Replies
- 10,893 Views
- memo
- November 1, 2024
Modding Made Easy: A Beginner's Guide
- 1
- 2
By docj101, April 10, 2013
- modding guide
- guide
- (and 4 more)
  Tagged with:
  
  modding guide
  
  guide
  
  beginners guide
  
  modding tutorial
  
  reader tutorial
  
  tutorial
- 38 Replies
- 15,101 Views
- rsc204
- September 15, 2024
SC4PIM-X 2026 & New Properties Update Out Now!
By Ulisse Wolf, Friday at 01:01 PM
- simcity 4
- 15 Replies
- 724 Views
- kaimai
- Yesterday at 06:44 AM
Colossus Addon Mod 3.0 Out Now
By Ulisse Wolf, August 18, 2025
- simcity 4
- colossus addon mod
- (and 1 more)
  Tagged with:
  
  simcity 4
  
  colossus addon mod
  
  CAM
- 5 Replies
- 3,073 Views
- Ulisse Wolf
- September 28, 2025
Train Mods
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- 4
- 57
By Trolca, August 18, 2003
- 1,692 Replies
- 98,554 Views
- vester_DK
- June 20, 2007
SC4Terraformer, a tool for regional handterraforming
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- 33
By wouanagaine, May 5, 2006
- 982 Replies
- 121,306 Views
- platinumranger
- February 27, 2015
Submenus DLL
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- 4
- 19
By memo, February 25, 2024
- simcity 4
- dll
- 547 Replies
- 44,119 Views
- jt233
- November 12, 2025
MGB Lot and Mod Shack
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- 4
- 18
By rsc204, August 20, 2014
- development
- mgb
- 530 Replies
- 64,571 Views
- rsc204
- June 13
SC4Terraformer Support
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- 3
- 4
- 17
By wouanagaine, July 7, 2006
- 505 Replies
- 42,017 Views
- Pioneer1011
- August 30, 2015
SimCity Aviation Group
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- 16
By pilotdaryl, July 3, 2006
- 475 Replies
- 47,131 Views
- city89
- July 3, 2015
Allow More Building Styles - DLL Plugin
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- 15
By Null 45, February 10, 2024
- simcity 4
- dll
- (and 2 more)
  Tagged with:
  
  simcity 4
  
  dll
  
  tilesets
  
  building style
- 429 Replies
- 24,664 Views
- Tyberius06
- 11 hours ago
LRM (Light Replacement Mod) - Support, Development and Discussion
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- 4
- 11
By MandelSoft, September 1, 2011
- lrm
- streetlight
- (and 3 more)
  Tagged with:
  
  lrm
  
  streetlight
  
  light
  
  replacement
  
  override
- 322 Replies
- 41,344 Views
- matias93
- September 26, 2025
Custom Queries for Custom Buildings
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- 11
By Kel9509, December 31, 2024
- query
- modding
- 317 Replies
- 8,886 Views
- Lab Rat
- February 27
Scoty's small tinkering
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- 10
By hugues aroux, April 16, 2022
- modding
- experiment
- (and 1 more)
  Tagged with:
  
  modding
  
  experiment
  
  scoty
- 279 Replies
- 23,078 Views
- hugues aroux
- June 28
simmars-forum-threads
SimMars - Overall Progress
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- 9
By AndisArt, August 28, 2006
- 268 Replies
- 35,903 Views
- AndisArt
- March 19, 2011
Interesting transportation task.
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- 9
By Guest, March 29, 2004
- 246 Replies
- 23,061 Views
- GoaSkin
- June 14, 2005
Simmer2's Lots and BATs Lab
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By Simmer2, September 14, 2016
- lots
- bat
- (and 5 more)
  Tagged with:
  
  lots
  
  bat
  
  rail
  
  rrw
  
  mmp
  
  train
  
  models
- 240 Replies
- 19,537 Views
- simmering
- December 20, 2025
simmars-forum-threads
Sim Mars, a SC4 Conversion
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By GouRou, March 2, 2004
- 232 Replies
- 17,376 Views
- TheCrybKeeper
- July 18, 2005
discovery
Modifying .sc4 savegames: It IS possible!
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By smf_16, June 18, 2019
- savegame
- script
- (and 2 more)
  Tagged with:
  
  savegame
  
  script
  
  program
  
  modding
- 229 Replies
- 28,501 Views
- THijSCiTy
- October 20, 2025
Let's write our own SC4 Building Styles
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By Ulisse Wolf, July 9, 2024
- simcity 4
- building styles
- 224 Replies
- 16,207 Views
- Ulisse Wolf
- February 2, 2025
Gone FSHin'
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- 8
By rivit, January 14, 2017
- simcity 4
- gofsh
- (and 2 more)
  Tagged with:
  
  simcity 4
  
  gofsh
  
  bender
  
  textures
- 223 Replies
- 17,603 Views
- Lab Rat
- February 7
Tropical Weather Expansion
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By TropicalWeatherEP, February 14, 2021
- weather
- tropical
- (and 10 more)
  Tagged with:
  
  weather
  
  tropical
  
  storm
  
  squall
  
  flooding
  
  tropical rainstorm
  
  tropical cyclone
  
  simcity4
  
  photoshop
  
  destructive
  
  stormsurge
  
  supercell
- 214 Replies
- 16,721 Views
- Lab Rat
- February 22

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Forum Activity
- I'm so confused
  
  By TheMurderousCricket · Posted: 1 hour ago
  
  First off, I would like to send you to this thread which I made when I was in the same spot that you are today. It revolves around numerous first-timer topics, which you might find useful. I hope you can find something for yourself! You are correct! This message sometimes means that Sims simply cannot find suitable jobs. Generally, the golden rule is to avoid laying out new zones, just because the demand is there. Treat it more like a supply, rather than an order... This is especially true of R$$$ citizens, the numbers of which are always low (as in real life). This is unfortunately true and most of your population will work in the commercial sector. There are mods, however that double or quadruple the number of industrial workplaces. I don't have too much time now, but I can show you some, unless someone else chimes in earlier. SC4 strategy, indeed, involves visiting and revisiting various cities repeatedly. This way they exchange information, demand and workforce. In a way? You were. Again, just because demand is there, does not mean you should use it right away. In fact, in order to see some of the most impressive buildings in the game, you will have to save up demand up to 7000 units or more!! If you keep zoning, you will never see them, because the demand will be diluted into countless smaller buildings. Plus, you risk abandonment from negative demand...
- Two WinTextEdits for one Query
  
  By Null 45 · Posted: 1 hour ago
  
  I don't know of any mods that do so, even DLLs that write their own save game data generally do so using a new records with a custom format instead of modifying a game object. SC4 itself stores all kinds of private data as properties that get added to the object's save data. Custom names attached to a lot's building are just one example of that.
- Two WinTextEdits for one Query
  
  By Propfam · Posted: 1 hour ago
  
  Do you have kids in RL?! Sorry, but I'm not ready for the convo yet. I wish I can. Back to the topic, well yeah, the Repository UI is the best example of multiple text field, tho rest of them are completely non-functional (I mean, can't be renamed or anything). I haven't heard a mod that allows storing data on a custom database, especially in regards of lots.
- Show us What you're Working On
  
  By mitsos · Posted: 3 hours ago
  
  Thank you Kergelen. No i didn't use water, you can build brigdes where there is a certain height between the two sides of the cliff.
- I'm so confused
  
  By darkscaryforest · Posted: 4 hours ago
  
  I'm a new player. This game just feels like a black box to me most of the time. When I have a problem or am successful at something, I only have concepts of the what or the how instead of solid knowledge of what is happening. I appreciate anyone who can help me understand more about the game with my current problems. I have NAM installed as well as various fixes (including hi-tech fix, opera house fix). No CAM mod installed. I've started my first region. I built a city in one of the small squares. I completely covered it with a mix of residential, commercial, and industrial zones. It looks fairly successful at first glance since I have 120k sims, a large surplus of money, high education/healthcare/desirability, and traffic is under control by having bus stops and a subway along with the roads. The problem is I have massive swathes of high-wealth, high density residential areas without jobs. Interspersed in these areas were buildings abandoned "due to commute time", but I suspect what that really means is "abandoned due to infinite commute time" aka no jobs. (Can anyone confirm if that's a real thing?) I wanted to say the issue was that I have high density residential stuff and low density industrial/commercial? I honestly don't know. What I mean is I mouse over a resident building and see spots for an insane 3000 people, where as I mouse over the biggest high-tech building I can find and it has like 100 jobs. Is it the case that way more of your land will be commercial and industry? I was kind of hoping I'd get very large workplaces too. I don't see how else I could raise the pop further otherwise. Since I was out of land to build more stuff...I knew one way to fix this was to go to a neighboring region and build commercial/industry there. So I did...and it sort of worked? Maybe? I could build a few sections of hi-tech and commercial before the demand zeroed out next door. Then I would reload the main city, quit, then reload the neighbor and low and behold a little more would magically build. I repeated this like 30 times and now 1/3 of the neighbor city is filled with hi-tech/high wealth commercial with 0 residents. I can't tell if I just exploiting a bug here on accident or if you're supposed to reload repeatedly like this. In main city, there are still a few places with no jobs, but I wanted to say that it worked and they are commuting. However, then I noticed a NEW problem. Now, almost all of my existing hi-tech and commercial in the first city are abandoned due to low demand. These places were fine before. I'm assuming this is because of the neighboring region. I don't understand..I thought I was just filling in the jobs that were missing? Yet somehow I have supplanted jobs in the first city... Was I wrong in thinking that I was filling in the missing jobs by building in a neighboring region? Maybe jobs are like pollution...trapped in the same city square Maybe my issue is about this magical, nebulous growth stage I've heard about? Like if I go off and make 3 other 100k cities, and then reload my first one sky scrapers could pop up and solve these density problems? I feel I don't have great control over this stuff. I just kind of float on vibes.
  Thanks for any help. Like I've said I've watched tutorials but it really feels like there's a lot of black magic here.
- 1,828
  
  Got a quick SC4 question?... Ask here!
  
  By City_Slider
  Started January 1, 2021
- 79
  
  SENT - Support & Development
  
  By Aka
  Started December 14, 2024
- 429
  
  Allow More Building Styles - DLL Plugin
  
  By Null 45
  Started February 10, 2024
- 15
  
  SC4PIM-X 2026 & New Properties Update Out Now!
  
  By Ulisse Wolf
  Started Friday at 01:01 PM
- 57
  
  LEX Files - New Download Links
  
  By simmering
  Started November 1, 2025

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