It's only a matter of time this will be fixed, also there probably already are custom LoRAs that can remove jpeg artifacts. So it's not a matter of if, only when.
I dont think so. You cant train away a compression artifact that comes from the model's core architecture, LoRAs can smooth or hide artifacts, but some detail will be inevitably lost. You can try to hide artifacts but not remove them without retraining the whole model on RAW sensor data.
gloosx|3 months ago