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fix: Klein 2 Inpainting breaking when there is a reference image #8803

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Merged
lstein merged 3 commits into from
Jan 30, 2026
+22 −3
Merged

fix: Klein 2 Inpainting breaking when there is a reference image #8803

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4c768b4
fix: Klein 2 Inpainting breaking when there is a reference image
blessedcoolant Jan 29, 2026
a680fa4
Merge branch 'main' into klein-inpaint-mask-ref-fix
Pfannkuchensack Jan 29, 2026
a15dcc6
Merge branch 'main' into klein-inpaint-mask-ref-fix
lstein Jan 30, 2026
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25 changes: 22 additions & 3 deletions invokeai/backend/flux2/denoise.py
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Original file line number Diff line number Diff line change
Expand Up @@ -152,7 +152,15 @@ def denoise(

# Apply inpainting merge at each step
if inpaint_extension is not None:
img = inpaint_extension.merge_intermediate_latents_with_init_latents(img, t_prev)
# Separate the generated latents from the reference conditioning
gen_img = img[:, :original_seq_len, :]
ref_img = img[:, original_seq_len:, :]

# Merge only the generated part
gen_img = inpaint_extension.merge_intermediate_latents_with_init_latents(gen_img, t_prev)

# Concatenate back together
img = torch.cat([gen_img, ref_img], dim=1)

# For Heun, only increment user step after second-order step completes
if is_heun:
Expand Down Expand Up @@ -239,8 +247,19 @@ def denoise(

# Apply inpainting merge at each step
if inpaint_extension is not None:
img = inpaint_extension.merge_intermediate_latents_with_init_latents(img, t_prev)
preview_img = inpaint_extension.merge_intermediate_latents_with_init_latents(preview_img, 0.0)
# Separate the generated latents from the reference conditioning
gen_img = img[:, :original_seq_len, :]
ref_img = img[:, original_seq_len:, :]

# Merge only the generated part
gen_img = inpaint_extension.merge_intermediate_latents_with_init_latents(gen_img, t_prev)

# Concatenate back together
img = torch.cat([gen_img, ref_img], dim=1)

# Handling preview images
preview_gen = preview_img[:, :original_seq_len, :]
preview_gen = inpaint_extension.merge_intermediate_latents_with_init_latents(preview_gen, 0.0)

# Extract only the generated image portion for preview (exclude reference images)
callback_latents = preview_img[:, :original_seq_len, :] if img_cond_seq is not None else preview_img
Expand Down