fix(flux2): apply BN normalization to latents for inpainting#8868
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lstein merged 2 commits intoinvoke-ai:mainfrom Feb 20, 2026
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The FLUX.2 Klein transformer operates in BN-normalized latent space, but init_latents from VAE encode were not being normalized before being passed to the InpaintExtension. This caused a scale mismatch when merging intermediate_latents (normalized) with noised_init_latents (unnormalized), resulting in visible artifacts at mask blur boundaries. Now normalize: - init_latents_packed before passing to InpaintExtension - noise_packed for correct interpolation in normalized space - x (starting latents) for img2img/inpainting workflows Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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I have tested this PR and it fixes all concerns i had regarding Flux.2 Klein inpainting. |
JPPhoto
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Feb 18, 2026
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Summary
The FLUX.2 Klein transformer operates in BN-normalized latent space, but init_latents from VAE encode were not being normalized before being passed to the InpaintExtension. This caused a scale mismatch when merging intermediate_latents (normalized) with noised_init_latents (unnormalized), resulting in visible artifacts at mask blur boundaries.
Now normalize:
init_latents_packedbefore passing to InpaintExtensionnoise_packedfor correct interpolation in normalized spacex(starting latents) for img2img/inpainting workflowsRelated Issues / Discussions
Reported issue: Strange artifacts appearing on mask blur regions when using FLUX.2 Klein for inpainting, particularly visible when regenerating over the same region multiple times.
QA Instructions
Merge Plan
Standard merge, no special considerations needed.
Checklist
What's Newcopy (if doing a release after this PR)