such a grasp of reflection and geometry--impressive.

How anyone can do it freehand is way beyond me.

-it seems like taking the principles that Escher used to draw reflections on a globe, but reverse the principles....maybe trace the drawing while looking at the column (reflective surface)? Wow, optical illusions are so interesting

take a pad of paper - about the size of a stenographers notebook (remember those!

and spell out a word anamorphically. How to do this is say you want to spell HELLO

the letters will take the entire depth of the page so the H will be hugely skinny and tall and not really recognizable as a H - just two long vertical lines with a small horizontal line near the middle. Do that for all the other letters and to read it you put that pad up to the bridge of your nose horizontally and then, voila, the word itself appears well enough to be read.