Thanks so much!!
To make the image, I found an existing image online to trace and reference, and then in PaintTool SAI 2 I used the "distort" tool to overlay my design onto that image. Adjusted the brightness of each panel to give the sense that they were pointing slightly different directions and therefore catching the light differently. Then drew the shadows with the "marker" and "blur" tools, and adjusting the transparency.
PaintTool SAI is absolutely not the best software for this, but I don't have Photoshop or anything similar, so I made do! :))
Tiny World TTRPG Jam » Entries » Spirulini's Travelling Carnival - an adventure location for Frontier Scum