I'm not buying it and will believe it when I see it. Do you draw? This is a sketch: Spoiler ^^ Trick question: What is the color of this cat? This is a photograph: Spoiler Source: https://en.wikipedia.org/wiki/Cat Difference: Photograph provides excessive amount of details. There's a load of local gradients that can be used to determine shape of object. Sketch provides just enough hints for a human brain to create an image of object in human mind. The data is fundamentally different. The photographic data produces information and this information could be possibly reasonably processed by a basic neural net. Interpreting a sketch requires understanding of symbolic language used by human mind. That's pretty much on ai level. An "AI assisted tool" in ideal case would take an artist's input, recognzie the intent, and then fill in the details. However, this is a completely different and significantly more complex problem compared to a simple depth reconstruction from a photo.