Using this design as inspiration, I created a single bed frame, followed eventually by a queen size bed frame. I drew the shapes from scratch in CAD using just their photos as reference material.
It goes without saying that I don’t claim any design originality with these - all due credit goes to Spore. For me, creating these was a learning exercise in CAD, plywood bending and slot joints.
I had to work out how I should model a bending piece of plywood in CAD. Should I just draw a thin curved face, then hope that the 12mm-thick cut piece in real life fits well enough with the ribs? How much does plywood stretch on the outside face compared to compression on the inside face?
It turns out that it’s feasible to work on the assumption that plywood will compress as much as stretch, so my modelling was based on a thin face which sliced through the middle of the curved piece. I drew these curved thin pieces, then expanded in both directions - towards the outside and towards the inside, equally - to fill it out into a 3D. From there, I did intersections with the ribs. Here is a view of CAD showing both of those in progress: