If you zoom in, the graphics are high-res 2D sprites, rendered from 3D models. And the level of detail can be ridiculous. From this week's Factorio 2.0 update (and Space Age add-on), here's an example of the zoomed-in detail: https://www.factorio.com/blog/post/fff-396 See the foundry animations? Those videos are actually slightly more blurred than the in-game version. And the sound effects are synced to specific animation frames.
So the world of Factorio is oftentimes brown and grim and covered in grime, but that's a conscious artistic choice. (Not all of the new planets are brown. Gleba is green and irridescent and frankly creepy.) Similarly, Factorio's 2D nature has allowed the developers to focus on gameplay and quality-of-life more than many newer games in the genre. If you want to build big, intricate factories with complex train networks, for example, Factorio really shines.
If anyone would like a game with 3D graphics, or a different graphics style, try:
- Satisfactory: The 3D world is gorgeous, and Satisfactory shines at "walk around inside your factory and tinker with it." Gameplay-wise, it has only recently gained blueprinting tools that allow working at a medium level of abstraction.
- Shapez 2.0: This is pretty and colorful and full of great little puzzles. It occupies a different part of the game-design space and is just a joy to play.
(Dyson Sphere Project and Captain of Industry also have great gameplay, but I don't know if their graphics are likely to grab people who find Factorio graphically underwhelming.)
There's also Shapez 1 and 2, which is like the essence of Factorio abstracted into shapes and colors. Shapez 2 has more mining and trains and multiple levels.
Satisfactory's main issue is that it lets you build in three dimensions without doing any physics to check if that build is mechanically plausible. It's of course not reasonable to expect them to do that physics. But it means that sophisticated logistics/organization problems in Factorio almost always have the same solution in Satisfactory: build more, but upwards. There's no reason to think long-term in Satisfactory unless you have a specific aesthetic vision for a base. Of course, a giant factory-skyscraper with tons of conveyor belts sticking out looks really cool! And Satisfactory being easier makes it more of a chill sandbox game than a tense strategy game like Factorio, so I get why aesthetics-minded people like it. Different strokes.
Course that means I often had oversupply.
Because your phrased your question like people that complain about the level of detail. Yes, factorio is ugly (although some trees are beautiful). And yes, that's a design decision.
There are some mods that reskin it. Personally, I don't think any of them are beautiful.
1. It’s simple, charming, and nostalgic.
2. I view it as a defense mechanism against the onslaught of modern gaming that’s locked in a race to the lowest common denominator (i.e. “Stay away! This game isn’t for you!” ;) )
Terrain looks better, trees look better, too, I think it's a pretty big change.
Any chance you have the game set to use 16-bit color?