I found an image of a spilt glass of wine and printed it out then did a freehand observational drawing of it, scanned it onto photoshop and adjusted the threshold to achieve this.
the right hand side drawing is a traced picture off the internet and the left hand side is a freehand drawing I did just by looking at the image. I scanned these onto the macbook onto photoshop and then adjusted the threshold to get it to look like this.
