Qwen-Image 2.1 LoRA training plagued by anatomy failures, community hunts for fixes

ResidentFrame4195 · reddit · 2026-09-21

A trainer spent hours fighting Qwen-Image 2.1 character LoRAs in ai-toolkit and reports severe anatomy failures: melted hands, extra limbs, double mouths, waxy skin and grotesque mutations — even at bf16 with zero quantization. Degeneration clusters around the 200-1500-1750 step mark before samples partially recover, then regress. The author suspects damaged base priors and is testing a corrective setup: heavier dataset, high-res buckets, quantized base, guidance loss and blank prompt preservation, with only slight improvement so far. Almost no usable LoRAs have been posted publicly, suggesting the community is all hitting the same wall; the post asks for working rank, lr, dataset size and resolution settings.

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