Sparky, ship's engineer, and Zane the captain, spot something interesting off the starboard bow of their airship, The Balilan. Sparky gives Zane a hard time about maintaining the rank and titles, seeing as they're a crew of 2, and a rather informal one at that, being smugglers. But he owns the ship, and rules are rules!
The additional pictures are just progress-shots of the process between artist and commissioner -- I find them really neat and interesting!
This art is by and setting is from Astolpho's Empyrean world. There's a running webcomic about the world (not about these specific characters though) starting here at Dawn Chapel. It's a world of magic, airships, floating sky-islands, and furries.