Suprisingly, it seems that this:
https://www.davidyek.com/yifengshui/-sanyuan-yinyang-early-heaven-gua#commentsAlso is falling into the same category I think.
Here one may wonder - why is it tilted...
Kevin Chan had videos about the combinations, I think it was referencing the same tilt(Wu/Wei etc.).
And logically, there are 2 tilts that could be based upon.
1. The Earth is tilted in relation to the ecliptic - the plane most activity in the Solar System takes place on.
2. That also means Earth is tilted in relation to the Sun.
While we can often see specific degrees, there is good reasons to think that the actual tilt is not static, it moves from around 21 to around 25 degrees if I remember, correctly.
Now, that brings so many fascinating questions.. First is, is this always valid?As in the second case(based on the light of the Sun), the presented tilt would be there only for the months around Summer solstice. As during the equinoxes, the light is equal, that is why the Day length is equal to the Night.
So is it static, or are there 3 or 4 more schematics based on the month... More research is needed!As wise forum members used to say...
Yet if it is based on the ecliptic, there is always tilt there, so doesn't need more schematics, this is the only one needed.
Anyway, fascinating stuff for sure, yet there still seem to be more questions then answers when it comes to the 3D representation of... Anything, really. : )