Thank you so much! 😊 Yes, for a CNN it is obviously important that the drawing actually corresponds to what the model expects: it is not only about the shape, but also the way the lines are arranged. And you are right, the allusion to summon Mutus is not quite the right one... it is deliberately a little misleading. This is why you couldn't invoke it... Here is an example image of Mutus rituals...
Everything about how the CNN is trained is here : https://github.com/methil-mods/rituals/tree/main/ritualcnn