here is a wiki page I ran into while googling star wars stuff
https://en.wikipedia.org/wiki/GreebleA greeble or nurnie is a fine detailing added to the surface of a larger object that makes it appear more complex, and therefore more visually interesting.
And here is a greebled cube from the Wiki itself.

The detail can be made from simple geometric primitives (such as cylinders, cubes, and rectangles), or more complex shapes, such as pieces of machinery (cables, tanks, sprockets).
This appears to be useful in vehicles, buildings, cities, props and almost anything you might draw, even outfits.
So the challenge is in several parts, which ever you fancy:
-Take an old drawing and add a lot more details to spice it up and make it more interesting
-Take a simple shape (cube, cylinder) and add details to make it look cool and interesting
-Take a normal object, prop, item of clothing, and add details to make it look cool.
Details can just be features of a similar theme, ie spacey parts in a spaceship, simple shape such as extra cubes and whatnot, or even a different theme to add a subtle extra layer of detail.
Steampunk is full of this kind of thing, and could almost have it's own workshop.
You could even post an image of an item for the next person to try and draw with extra details.
That being the case, if someone fancies it here's the first image. No restrictions on how you change it as long as it resembles the original item. It could even end up as a different object if you want (ie. vehicle/spaceship etc)