If you are looking for a 3D printable wall clock with a USP, Lewis from DIY Machines has created one inspired by the Hollow ...

Thus, the clock features an LED light source which can project the clock’s shadows into a much larger display than the desktop timepiece itself. As for the electronics, it’s straightforward stuff.

Also shadows from low-angle light can also be cast upon vertical surfaces such as walls as well as the ground. It all depends on what kind of effect you want in your picture.

Researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow, opening new possibilities for technologies that could use a laser beam to ...