A personal AI art project generating high-quality AI content. Images are free to browse and download.
CodeSaj is a personal side project built around fine-tuned AI image generation models. The goal is simple: create high-quality wallpapers of specific characters and make them freely available.
The project started in January 2025 as an experiment and it is slowly growing into something big.
Fine-tuned Stable Diffusion models trained on specific character datasets for accurate likeness.
Images are generated at lower resolutions, then upscaled to higher resolution matching PC/Mobile aspect ratio.
Images sorted by character, orientation (landscape/portrait) and content rating (SFW/NSFW).
New characters, images and features are added regularly as the project keeps evolving.
I'm a full-time game developer with 14 years of programming experience across Java, C#, C, Python and a handful of other languages picked up along the way. Outside of work I run personal projects purely as a hobby — CodeSaj is one of them.
When AI image generation started maturing, I saw it as an opportunity to go deeper than just using existing tools. I set out to learn the full pipeline: collecting and curating training data, fine-tuning models on specific characters, and iterating on prompts and samplers to push output quality. Over time the tooling I built around this workflow has reached a point where — in terms of time invested vs. quality produced — it holds its own against many free and paid online services.
The project lives entirely in my free time. I keep training new characters, refining quality and adding generation features as I go. The underlying tooling is not open-source and I have no plans to publish it — this gallery is simply the public-facing output of that work.
A snapshot of what's been built, what's being worked on, and what's coming next.