Something is missing in the right corner but I do not know what.... If you have any suggestions, I'd love to hear
Looks like the light is coming from that direction, so maybe a small torch or coals or something?
Flip the image R-L might help. Then we are drawn back to the empty space, not left to drift out of the image through it?
maybe just the haze of a bright light shining in the corner would fill the space?