You don’t think they cannot visualize Motor6D and bones connection and their relative offset and playback? Animations published to the site have a report feature. I think it is safe to say, they can visualize animations without a visual rig and do a much deeper dive in your assets and the elements in your game to figure it out… It’s a black box, so it being nearly impossible sounds more like a speculation than anything else.
I can tell with visualization that this is a spider rig and there are Anthropomorphic rigs With visualizations alone.
