This was fun and it melted my brain. I came across this wall by István Orosz and wanted to study it. On one hand it looks obvious how it's "build", but also there is something off about it. And I can't seem to figure out how to get the gap on the inside of the walls without cheating or changing the view. Because making the middle piece longer results in a longer wall or thicker walls elsewhere.

I have been figuring out the impossible staircase. The shape is distorted, it is longer on the right than on the left. This is due to the fact that in axonometric projection, the treads can go up or down but the risers always go up. To compensate for this, the flights of the stairs where the treads go down on paper need to have more stairs or longer treads. Nothing can be done about this...

I hope I'm not too late. Drawing separate illusions didn't seem interesting, so I threw random stuff together. Was in a bit of a rush and even though it was my drawing, I've managed to break my brain in a few places and made some mistakes.

I have a question about this piece. In the video Marshall points out a vanishing point as the boxes forming the lozenge shape move away from us. I understood from this that our eyeline runs horizontally through that point. Why is it that the top plane of the chimney isn’t visible when it’s below the eyeline? I think I’m not understanding something Thanks!