10:18 PM, Thursday April 30th 2020
On the subject of the hercules beetle's horn and the shadow it would cast, remember that a shadow is essentially taking 3D information and projecting it down into two dimensions. This process inherently throws away certain pieces of information, depending on various factors. In this case, since the light source is higher up, and the curvature is primarily on the Y axis, then the curvature won't actually have much impact on the shadow itself. If the light source were more to the side of the beetle, then we'd catch more of that curvature.