Generate an image based on Revelation 11:3 - 'And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.' The image should depict two figures of unspecified descent, one a middle-aged woman and the other an elderly man, standing strong and solemn in rough, sackcloth attire. They are in a shadowy, enigmatic landscape, suggesting the passing of more than a thousand days, their faces illuminated as if powered by unseen forces. For stylistic preferences, take inspiration from pre-1912 art movements such as the symbolic and high-contrast features often found in Baroque art, utilizing a digital medium.