The better the picture of your painting, the better the impression it gives to the public and the jury. You don't necessarily have to have your work photographed by a professional photographer to get a good picture, although it can be very useful. Here are a few short tips to avoid the most important mistakes:
Look here for an instructional video of Saatchi.online: www.youtube.com/watch?v=Vpj28da03JQ
How could Painting of the year NOT use the Color for the year for it's website?