Invokeai node SDXL structure: SDXL and SD1.5 nodes: InvokeAI nodes.zip
SDXL 0.9 Archive
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InvokeAI nodes config
last version included the nodes for the refiner.
Note: to control the strength of the refiner, control the "Denoise Start" satisfactory results were between 0.3-0.65
Scheduler of the refiner has a big impact on the final result