lllyasviel / lllyasviel/sd-forge-layerdiffuse

[fix] Fix for Forge Neo 2026 compatibility (type "lora" is not recognized)

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Description

Tested on Forge Neo: 2.29 (september 2026)

`unet.load_frozen_patcher()` builds LoRA patches in a raw format `("lora", [tensors])` that Forge Neo's `merge_lora_to_weight` no longer recognizes, causing a crash when using any of the SDXL layer methods
(FG_ONLY_ATTN, FG_ONLY_CONV, BG_TO_BLEND, FG_TO_BLEND, BG_BLEND_TO_FG, FG_BLEND_TO_BG):

`ValueError: "diffusion_model.output_blocks.2.1.transformer_blocks.9.attn2.to_v.weight" of type "lora" is not recognized...`

Fix:
~~sd-forge-layerdiffuse (for Forge Neo 2026).zip~~

update: fixed the errors for "SDXL From Foreground to Blending" and some others.
[sd-forge-layerdiffuse (for Forge Neo 2026) fix 2.zip](https://github.com/user-attachments/files/32353176/sd-forge-layerdiffuse.for.Forge.Neo.2026.fix.2.zip)
Too many edits to the files to list them here...
SD1.5 modes still don't work though.

update: fixed the errors in SD1.5 modes
[sd-forge-layerdiffuse (for Forge Neo 2026) fix 3.zip](https://github.com/user-attachments/files/32383696/sd-forge-layerdiffuse.for.Forge.Neo.2026.fix.3.zip)

Posting it here in case it helps someone, or someone wants to pick it up properly and start a fork. I won't fork it myself because I am not a python dev, most of the job for this fix was done by Claude AI.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at unet.load_frozen_patcher() and inspect how raw ("lora", [tensors]) patches reach Forge Neo's merge_lora_to_weight. Reproduce the failure with the listed SDXL and SD1.5 modes, then compare behavior with the attached fix archives. Done means all listed modes no longer raise the unrecognized-type ValueError.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
machine-learning
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
38/100

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