rzgar

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LTX-2.3-Motion-Enhancer-n4w

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hight change we will get scary and ugly scars on body in upscale period. i wonder if it is the lora or ltx 's problem. I have not met this problem before

Can you share a video with the workflow embedded? It would make it easier to pinpoint the issue. Usually, if skin or deformation occurs, it’s mostly due to a heavily quantized text encoder or the base model being overpowered. *cfg_pp samplers also can be problematic sometimes in the base model is distill

only change the models, using the comfyui ltx2.3 i2v template.

appears on the body part hidden from the first frame, for example when hand moves, a scar shows in hand's last position . change a seed in upscale peroid may solve , but seems high chance.
I tried other lora to generate a few tests, none of them has scars

gemma in4

only change the models, using the comfyui ltx2.3 i2v template.
appears on the body part hidden from the first frame, for example when hand moves, a scar shows in hand's last position . change a seed in upscale peroid may solve , but seems high change.
I tried other lora to generate a few tests, none of them has scars

Gemma int4 is the issue. try gemma-3-12b-it-heretic-v2_fp8_e4m3fn.safetensors if your hardware allows, the lora itself is rank126 bf16

thanks