Sims 1 Legacy - Bad UI scaling on 4K/high DPI screen

If you have a 4k monitor then your sweet spot is going to be 2k (2560 by 1440). This will provide you with the best ratio between UI and gameplay.
The zoom is also not a problem as it is with 1k (1920 by 1080) where the maximum zoom is still fairly zoomed out.
You also have less pixelation at 2k compared to 1k on a 4k monitor and if you where experiencing slight stuttering (lagging) at 4k, this should also no longer be present.
As for the UI pixelation, UI is usually handled in a seperate pipeline compared to actual gameplay rendering, meaning the Vulkan API as amazing as it is, does have limitations. UI is something that needs to be changed manually and since this isn't a HD remake or Remaster but instead simply a legacy re-release it's something we have to accept. I'm sure modders will step up soon though.

This issue with pixels swapping appears to be a bug with Nvidia drivers.

Described here by riperiperi. I set Vulkan/OpenGL present method to Prefer native for The Sims Legacy as he described and now it renders just like it did before I updated my drivers. You might want to try it, jnhmthw 

It is actually a bug, but the other way around. At all supported resolutions (720p, 1440p, 2160p etc) the UI looks big and comfortable as intended.

On 1080p ONLY they didn't scale it up, and it looks super small. I'm having to play on 720p on my 1080p screen since the text is borderline unreadable on my 15" laptop.

PS.: The text on scaled UIs can't be made clearer since they're basically zooming the bitmaps. The UI will remain pixelated.

This ^.
I was hopeful to see it addressed in today's patch #2 however it wasn't.

I can confirm that running The Sims 1 Legacy Collection on a native 1080p desktop still renders the UI far too small, especially when compared to other desktop resolutions. This is not an issue on desktop resolutions smaller or larger than 1080p, where the UI is automatically scaled up to make it appropriately readable.

EA_Solairewould it please be possible to get confirmation that this is a recognised issue?
Summary: Running Sims 1 on a 1080p native desktop renders the UI too small.
Many thanks.

Thanks so much Rakeeya. I first tried the 2nd patch as-is as it mentioned visual artefacts, but there was no change. I then did the NVIDIA control panel workaround as you suggested, which looks to have resolved the glitchy pixel swapping. Thanks!

Thanks for pointing out that article too - it's a great analysis of the graphics of the new release in general, and explains well the issues with high DPI scaling that I've been trying to speak to in this thread.

GitHub user riperiperi has written a great technical analysis of the graphics of the new release, and does a great (and much better!) job explaining the issues with high DPI scaling that I raised with this thread.

Essentially, it seems 1080p and lower is rendered at 1x resolution, so pixel for pixel as the original game while filling up the rest of the screen at that scale. (This results in very small rendering of UI for many people which is a valid issue that should be addressed, but I encourage those affected to report the problem in threads specific to that issue such as  here and here) 

At higher resolutions, the game scales the graphics up: 1440p is 2x, 4K is 3x. 3D elements are rendered natively, and sprites and UI are scaled up to match. From riperiperi's article: (I have bolded for emphasis)

At 4K DPI, this causes each sprite pixel to be tripled in both axis, with some odd exceptions. It's like playing at 720p, but with much sharper looking sims.

Interestingly, when zooming out with res scale active, the game will prefer to use the near view sprites... for everything except pools. This keeps things sharper when zooming out compared to playing at 720p, though with the 3x scale at 4K, the middle zoom is a 1.5x zoom, which introduces some ugly pixel scaling.

As I originally mentioned, I am fully understanding that this is an older game and I am not expecting completely new pixel perfect bitmaps. What I am hoping for, as does the author, is improvements to the scaling that they have implemented for 4K screens so it's less uncomfortable to view, and developing an in-game way to configure the UI scale and DPI/resolution per the player's preference for their screen size.