Bad habits are hard to brake. I rotate my paper. I found an angle that allows me to draw a fairly long straight line. so I stick with it. I tried not moving my paper and it did not go well. the amount of wavy and crooked lines that came out of my hand was discouraging. had to stop for today. I will give it another go tomorrow. Will post those attempts. the good, the bad and the ugly... Earlier today was still playing with another illusion. not an original. I found it through Pinterest. don't know who did this one originally. I somewhat figured the measurements that fit the page and ran with it. (took me about 5 tries to get it right). My T-square skills are very rusty and I kept letting it get off the side, making my lines crooked. so nothing would match up and I would have to start all over. but in the end. got it to work.

You don't suck at jokes Marshall! I have a question about the importance of line quality in construction. I have learned from my granddad who was a building engineer that if you intentionally waver the line a little, it is much easier to get a very straight line overall. Now I understand that learning to draw fast straight lines is important for artists, because these lines look a lot more beautiful, confident and natural than the slowly drawn jittery lines. Is it important though for something like perspective? Can I use my 'granpa lines' to draw straight lines for construction?

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!