The Z-image turbo model is pretty heavily distilled. I can't imagine using it for any marginally complicated prompts.

Are you talking about the LoRA by LuisaP?

Somewhat ironically, that LoRA's showcase images themselves exhibit the exact issues (non-square pixels, much higher color depth than pixel art, etc) that stuff like this project / unfake.js / etc. are designed to fix.

https://imgur.com/a/vfvARkt