Photorealistic drawing of Brad Pitt - learn photorealism on your phone

This vdeo drawing was done on my Samsung phone using the Paintology drawing app from Google play store. Link below. I was watching the Wimbeldon final and the camera kept panning to the audience where Brad Pitt was sat. I decided I should make a drawing of him and take it one step further and make it look photo realistic. If you serious about doing photorealistic drawing, the easy way on your phone or tablet, please add to the comment. Most importantly, don’t forget to like and subscribe so that I know the level of interest in this topic. I started with a previous drawing of the outline of Brad Pitt that I made and used this as the base for my freehand photorealistic drawing. Phases to the photorealistc drawing of the portrait Brad Pitt: I made several passes of the drawing in order to achieve photorealism. Total sittings was around 5 and each time, trying to reach a level of realism. I would estimate that the time required to make this drawing was over 4 hours. I use