Yes this is a painting!
many painters working from photographic source material employ a wide variety of techniques to arrive at a final image. this will involve anything from loose sketching beforehand to complex grids, where a photograph is translated into paint box by box. such is not the case with british painter nathan walsh who instead relies on elaborate drawings reminiscent of architectural blueprints before every committing paint to canvas. this deep reverence for the underpinning geometry and perspective gives each work a sense of life that might otherwise not be present in something created with the mechanical aid of a camera or software.