And I just realized I got the size specs wrong, so I gave it another render with the correct aspect ratio:
To add a bit to the motivation for the piece, I thought I'd be interesting to try to do a picture where the action is implied. Dropping a handkerchief was a traditional way to start gun duels, but using swords allows for a tighter composition. We are looking at a fight that is just about to start with only a fraction of a second to go before the hankie hits the ground. The poses suggest how this fight will begin (at least to me they pretty much spell out how the next 50 frames or so of animation would look like).