I've also been trying to do super accurate perspective drawing. I didn't save the tracing paper that had all of my crazy lines for the bookcase on the left side, but they were intense- I got way too hung up on this project, but it was a good way to get back into accurate perspective drawing. I think this started out as an accurate perspective drawing of the tree house "royal" bedroom that I posted earlier, but became something more... The bottom image is the cleaned up linework. Still not sure what I want to do with this, but I think for now I'm just leaving it alone. I'm sure something'll come to me.