I have seen a bunch of MJ Models flying around, but I couldn't get the --test aesthetic from them. So I went ahead and collected 35 images from midjourney gallery, flipped them, and trained a model for 7000 steps (640x640). Results were surprisingly pretty good and pretty customisable.
token used - mjstyle
Adding it to the end of the prompt gives best results.
E.g.:-
painting of a robotic snake, 4k, hd, by artgerm, by greg rutkowski in mjstyle, (Modular Origami) [ Euler a, CFG scale: 7, Seed: 4077618648, Size: 640x640 ]
painting of emma watson, 4k, hd, by artgerm, by greg rutkowski in mjstyle [ Euler a, CFG scale: 7, Seed: 4275282758, Size: 640x640 ]
painting of a cute panda in woollen sweater, pastel colours, unreal engine, volumetric lighting, octane render, 4k, hd, by artgerm, by greg rutkowski in mjstyle [ Steps: 28, Sampler: DPM2 a, CFG scale: 7, Seed: 4084558927, Size: 640x640 ]
painting of a cute panda in pink woollen sweater, pastel colours, unreal engine, volumetric lighting, octane render, 4k, hd, by artgerm, by greg rutkowski in mjstyle [ Steps: 28, Sampler: DPM2 a, CFG scale: 7, Seed: 1901722599, Size: 640x640 ]
license: openrail