If you dip your face into freshly-fallen snow and take a picture of the imprint with your flash on, you’ll likely end up with a 3D image of your face. Source Source 2 Source 3

Photo: @xlhub 

Photo: @hetklokhuis

Photo: @Harm040

Photo: @ADnl

Photo: @ADnl 

Of course, it doesn’t always work out… hence the word “might”:

Photo: @TeamTychoEnGuus