Baseline (Widescreen) Solution & Issues
Only 4:3 resolutions are listed in-game; the steps below unlock all resolutions (from SimCity 3000 Unlimited Resolution Fix posted by Lanak)
- Open SC3.EXE or SC3U.exe with a hex editor
- Search for this byte sequence: 8b 4c 24 04 8b 44 24 08 53
- Overwrite the first four bytes with c2 08 00 90
- Search for this byte sequence: 8b 4c 24 04 8b 54 24 08 81 f9
- Overwrite the first four bytes with c2 08 00 90
Everything has the correct aspect ratio but the menus and UI are always at the original size rather than scaling with the resolution.
The game crashes with certain resolutions (such as 1600x900).
The intro cutscene does not work on modern versions of Windows (it can be skipped using the -intro:off command line argument).
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Same as widescreen solution.
Eyefinity / Surround Specific Solution & Issues
Same as widescreen solution.
4k UHD Specific Solution & Issues