There are two errors that you should try to learn from in this image.

The first is Che'ro's feet. Something feels off-by-one about them, but I can't place it. I'm afraid that is for you to figure out.

The other one is the decorative timer that Daniel uses for his wood and metalworking - in the photo, it had two colors of gel suspended in liquid, with black endcaps. The bottom endcap has a discrete perspective error; this comes from trying to jump from the back edges (what would normally be hidden from view) to one another. However, the neglect is that the right edge and left edge do not fall evenly in 3d space. I'd have to pull the photograph, but I think the left one joins the glass too high. Just a guess; again, I'd have to look at what you were seeing again.



Hehe... Someone is going to walk in on Irene and me on the couch together one day when she's petting me so I'll get some sleep, and they'll see that, and put two and two together. If I remember, I'll detail that day for you.