I've noticed and appreciate that the HD planets are rotated in a way that the lighting is consistent with space platform, but since Visible Planets uses the sprites in the space map, it results in the bright side of the planets not facing the sun.
Now that VP added an option to customize planet rotation, you can use the same rotation as the vanilla sprites without it looking strange in either the space map or space platform view.
Phenomenal renditions btw! Another mainstay mod for the list.
