This is a ComfyUI model merge node for Z-Image.

It's almost identical to the standard ModelMerge node, but none of them perform any operations on the refiner layer; they output the model1 value as is. Use this when modifying the refiner layer is inconvenient.

I've also added a multiplier to ModelMergeAdd. This is a multiplier applied to the model2 value. It's the same as ModelMergeSubstract; when the difference is input as model2, the product of the two values ​​is actually used. This means it can multiply up to 100 times, but in reality, around 20 times is probably the practical limit. I set it because calculations suggested a 100x multiplier might be necessary in some cases, but in practice, that wasn't needed. However, there are still situations where it's necessary. -1 might also be useful.

In ModelMergeSubstract, turning on the report will display a summary of the process (this takes a very long time). Recommended multipliers are also displayed, but please take them with a grain of salt if the values ​​are too large. A maximum of around 20 seems to be within the practical range. Values ​​exceeding 10.0 should be set in conjunction with the aforementioned ModelMergeAdd.

ComfyUI\custom_nodes\zimage_merge_nodes
　　init.py
　　nodes.py

It can be found in the menu under advanced->model_merging.