Let AI seamlessly extend your wallpapers to fit any screen.
When a wallpaper’s aspect ratio doesn’t match your monitor (for example, a 4:3 photo on a 16:9 screen), BioniX traditionally stretches, crops, or adds black bars. With AI Border Fill, BioniX uses artificial intelligence to extend the image borders naturally — generating new content that blends seamlessly with the original.
The result is cached locally so each wallpaper is only processed once. You can generate on demand (one image at a time) or pre-process your entire playlist in the background.
BioniX supports two categories of AI providers. Pick whichever suits you best.
AI runs on your own computer using your GPU. Your images never leave your machine.
AI runs on remote servers. You send images via the internet and receive results back.
Local Free Most flexible option — supports any model you install.
sd-v1-5-inpainting.ckpt or a Stable Diffusion XL inpainting model) and place it in ComfyUI’s models/checkpoints/ folder.http://127.0.0.1:8188 by default.http://127.0.0.1:8188 (the default).Local Free Simpler local alternative. Forge is the actively maintained fork with better performance.
--api to the command-line arguments. For example: webui.bat --apimodels/Stable-diffusion/ folder.http://127.0.0.1:7860 (the default).--api flag is required. Without it, the WebUI won’t accept requests from BioniX. If you forget it, the “Test Connection” button will report a connection error.
Cloud providers require an API key. Sign up on the provider’s website, generate a key, and paste it into BioniX.
Cloud Dedicated outpainting endpoint.
Cloud The most affordable option.
Cloud Highest quality.
Cloud FLUX.2 models — excellent quality.
Cloud Wide model selection.
Estimated cost to process a typical playlist of 500 wallpapers (assuming ~30% need border fill = 150 images).
Stability AI price checked on 2026-09-14; the other prices may have changed — see each provider’s pricing page.
| Provider | Per Image | 150 Images | Speed |
|---|---|---|---|
| ComfyUI / Forge (local) | Free | Free | 30s – 4 min |
| Runware | $0.0006 | ~$0.09 | 5 – 10s |
| Stability AI | ~$0.04 | ~$6 | 5 – 15s |
| Replicate (FLUX.2) | $0.03–$0.055 | $4.50 – $8.25 | 10 – 30s |
| fal.ai | $0.01–$0.08 | $1.50 – $12 | 5 – 15s |
| OpenAI (GPT Image) | $0.04–$0.12 | $6 – $18 | 5 – 10s |
| Enable AI border fill | Master switch. When off, BioniX uses traditional resize modes. |
| Provider | Choose which AI service to use for image generation. |
| Server URL | For local providers only. The address where ComfyUI or SD WebUI/Forge is running. |
| Test Connection | Verifies the provider is reachable. For ComfyUI, also checks that an inpainting model is installed. |
| API Key | For cloud providers only. Your authentication key from the provider’s website. |
| Workflow | For ComfyUI only. Use the built-in workflow or browse for your own (must be exported in API format). |
| Quality slider | Balances speed and quality. “Fast” uses fewer AI steps (faster, slightly lower quality). “Best” uses more steps (slower, higher quality). |
| Prompt | Instructions for the AI. The default works well for most images. Customize if you want a specific style. |
| Negative prompt | Things to avoid in the generated areas (e.g., “ugly, distorted, watermark”). |
| Processing mode | On demand: generates when each wallpaper is displayed. Background: pre-processes your entire playlist ahead of time. |
| Cache | AI-generated images are cached locally so each wallpaper is only processed once. You can clear the cache at any time to free disk space. |
Local AI image generation is GPU-intensive. An NVIDIA GPU with at least 6 GB of VRAM is recommended. AMD GPUs work with some setups but NVIDIA has the broadest compatibility.
| GPU | VRAM | Approx. Speed (1024×1024) |
|---|---|---|
| RTX 3060 | 12 GB | ~3–4 minutes |
| RTX 4070 | 12 GB | ~1–2 minutes |
| RTX 4090 | 24 GB | ~20–40 seconds |
| RTX 5080 | 16 GB | ~30–90 seconds |
Don’t have a powerful GPU? No problem. Cloud providers work on any computer — even without a dedicated graphics card.
Only for cloud providers. Local providers (ComfyUI, SD WebUI/Forge) run entirely on your machine with no internet required.
With local providers: no. Your images stay on your computer. With cloud providers: images are sent to the provider’s servers for processing. BioniX shows a one-time privacy notice when you first select a cloud provider.
BioniX falls back to its standard resize mode (stretch, crop, or letterbox). No error is shown — it just works the traditional way.
Yes. BioniX generates a separate variant for each unique monitor resolution. If you have a 1920×1080 and a 2560×1440 monitor, both get their own optimized version.
Most AI models have a maximum output resolution. BioniX generates at the model’s maximum and then upscales to your monitor’s resolution using high-quality Lanczos resampling. The result is cached at full resolution.
Each cached image is typically 2–8 MB. A playlist of 500 images, of which about 150 need border fill, would use roughly 300 MB–1.2 GB of cache. You can see the current cache size and clear it from the AI settings tab.
--api flagAfter the 15-day trial, keep BioniX free through the community program: post about BioniX, and how far your post reaches decides your membership.