negcrop

confirmedupstream bugPython · diffusersSystems & data structuresJuly 24, 2026

the question

Does SDXL base img2img/inpaint honor negative_crops_coords_top_left in _get_add_time_ids?

what came out

diffusers SDXL _get_add_time_ids packs the positive crops_coords_top_left into the negative micro-conditioning vector on the non-aesthetic branch, the default for the SDXL base model, silently ignoring negative_crops_coords_top_left while honoring the negative original_size and target_size. Affects img2img, inpaint, and ControlNet img2img pipelines.

method & receipts

Result: confirmed
Reproducible — one script re-runs the whole thing from scratch.
Tested — a correctness/benchmark suite ships alongside the code.

→ read the code and re-run it

github.com/v-code01/negcrop