While merging, if you pick a value below 0 or above 1, you will extrapolate rather than interpolate, which will allow you to create merges that lie outside of your usual "gamut", so to speak.
(1990s2000s_v10, beenyouToon_alpha2)
It can be achieved by altering some lines of code in "ComfyUI\comfy_extras\nodes_model_merging.py".
Simply change
"min": 0.0, "max": 1.0,
to
"min": -1.0, "max": 2.0,
It should look like this:
(I've also attached an already edited version of nodes_model_merging.py in this article.)
This will unlock new opportunities for experimentation. Don't be afraid to save a model that makes fugly ass deep fried images. In fact, a pinch of one of those can add a lot of flavor to your next interpolation!
Little trick I learned on Artbreeder. (Yes, even now, I spread the good news of "extended sliders" ππ)
Happy splicing!