This is a grape that was once spherical. To make these grapes this shape I searched on google and found these grapes by Seth Taylor. Once I found it I went to Photoshop and used liquefy filter to make edges onto the grape and make them less round and more pointy. After this i worked on the edges and made them even more sharp. After tuning the corners I created the original shadow to become more realistic. And Tada! A square grape!
This photo is originally by John Kingkma. For this photo i used Duotone and made the photo more darker then orginally is.