Under an assumption you are reading this on a phone, take your phone and rotate it counter-clockwise 45 degrees and then look again at that rendering: is the li

Under an assumption you are reading this on a phone, take your phone and rotate it counter-clockwise 45 degrees and then look again at that rendering: is the light now the top-left face or the bottom right face? The issue for me is not that the light is really telling me the orientation, but the slope... and so I feel like the light is coming from the bottom right here (preferentially: I can force myself to consider either). In the original orientation, if I convince myself the light is at the bottom of the cube the surface feels really awkward as it is receding away from me top to bottom, not due to light but simply geometry, which is not common: things that are stacked that way tend to collapse into things that are stacked the other way (and so hills are also like that).