Fun stuff for Descent fans: Material Defender pilots a custom coated Black Pyro through a gas giant atmosphere. A lower sulfurous layer boils up huge cloud bubbles rapidly rising through an upper toxic layer of gas that is denser than the hot sulfur clouds. Reflections come from spheres of hot fluid bubbling up and vaporizing into mist on their surfaces making them look like yellow puffballs. Their rise velocity similar to the bubbles you see in a tea kettle, but on a huge atmospheric scale. [Black Pyro was modeled by another Descenter] Rather rough flying I would think. For the Descenters: Thief bots have a base floating in the clouds where they make mutated bots that terrorize the asteroid and Kuiper belts.