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Flux Latent Upscaler Workflow: Enhancing Image Resolution with Flux AI
Understanding the Issue
The Flux latent upscaler workflow improves image resolutions by initially creating a low-res pass and then advancing to upscale it in the latent space. This process helps retain the original composition while enhancing fine details. Users have reported some issues with ghosting and hallucination effects.
Example:
I am getting ghosting on the final image.
Solution: Adjust the denoising levels, especially on the third pass. Some users have found that setting it around .70 helps mitigate these effects.
The Upscaling Workflow
What It Does
The Flux latent upscaler creates a lower-resolution initial image and then upscales it in latent space. Though not exactly doubling the resolution, it comes very close and helps maintain the original composition while adding fine details.
Seed Modulation
Seed Modulation adjusts the third pass, allowing for slight changes in the same composition by mixing a new random seed with the fixed seed from the first pass.
Example:
This 3rd pass takes ~112 seconds on my RTX 4090 with 24GB of VRAM.
Practical Tips
Adding a Film Grain Effect
A film grain effect can be applied to add an analog vibe to the images. This is optional and can be disabled.
Speed vs. Quality Trade-off
Using Hyper Flux Loras in the workflow can significantly cut down on the steps and boost processing speed, although at a slight degradation in quality.
Common Issues & Solutions
Ghosting on Final Image
Report:
I am getting ghosting on the final image.
Fix: Adjust the denoising level, particularly in the third pass.
Overloaded GPU
Using higher-end GPUs like the RTX 4090 can significantly reduce processing time. For lower-end GPUs, consider using workflow adjustments to balance quality and speed.
Example: RTX 4090: ~112 seconds RTX 3060: ~40 minutes
Link to Original Example:
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Additional Resources
GitHub Repository
Find the complete workflow here: Flux Latent Upscaler GitHub
CivitAI Article
Read more about the upscaler: CivitAI Article
More Workflows
Explore a collection of workflows: OpenArt Workflows
By following these steps and utilizing the resources provided, you can effectively upscale images using the Flux latent upscaler workflow while maintaining high-quality results.