i worked this out as a beginner project on FreeCAD. you can use 1.5mm conduit pipes and some PVC sheets to make a soft tent enclosure to cover up your 3d printer. although L-bends & T joins are easily available in the market, a corner bend join is not that common. i hope this comes in handy to someone looking for a cheap alternative case for their printers or someone looking to make a tent playhouse for kids. print 8 for a box structure and cut out 12 pieces of 1.5mm conduit pipe after measuring endto end x,y movements (especially for bedslingers, you gotta factor in the extended bed movements for the y-pipe measurements). if you need a corner join for a pipe with  different diameter, i have attached my project files along with the stI. you can edit the sketch dimensions accordingly