I don't have an Ipad so I'm unsure if you can use this option.

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BTW I had never heard of Gerard Richter so looked him up and was intrigued to read how he produced his paintings.

Many of these paintings are made in a multi-step process of representations. He starts with a photograph, which he has found or taken himself, and projects it onto his canvas, where he traces it for exact form. Taking his color palette from the photograph, he paints to replicate the look of the original picture. His hallmark "blur" is achieved sometimes with a light touch of a soft brush, sometimes a hard smear by an aggressive pull with a squeegee.
We can do this with AR - in fact I have done something like this quite often. He can demand millions for his paintings!