@Mikezumi HQ mods aren't good for normal gameplay because they tend to cause memory related crashes.
Anyway, @Mstybl95 , I see from your new computer thread that you have an nvidia card. Personally, for more dynamic and interesting lighting beyond what I can do in game (with light placement like Mikezumi mentioned), I use Nvidia Freestyle. It's basically Nvidia's version of ReShade, but it doesn't require you to mess with any files and you can dynamically change settings while in-game.
You can enable it in Nvidia GeForce Experience. Under settings, enable "experimental" features and also make sure your in-game overlay is enabled as well. Then, in-game you can open Freestyle with alt+F3 and you can mix and match effects until the game looks how you want it to. They used to not save, but it seems they do now. So the settings should apply themselves whenever the game is open. Just make sure you take into account how the effects you add will mess with the game's UI. Too much bloom or depth of field settings might make it hard or impossible to read. :lol: So you'll have to play around with it. Also, the effects won't show up in normal screenshots (or FRAPS). So you'll have to take any screenshots with Nvidia. The keyboard shortcut is alt+F1 and the screenshots are saved under Videos>Sims 3. To note: It will also screenshot the UI, so make sure you hide the Sims 3 UI with the keyboard shortcut F10. Hitting F10 again will unhide the UI.
I'm about to go in-game, so I'll be sure to post my exact Freestyle settings if you're interested. Here's some unedited pics using Freestyle:
https://i.imgur.com/QxV4qf4.png
https://i.imgur.com/Z2sbCOa.png
https://i.imgur.com/PPoGGPU.jpg