Follow along and draw this arch optical illusion step by step. This illusion is just as good as the impossible triangle illusion=). For this drawing, I am using a 4B graphite pencil. Anything will do as it’s the illusion that counts. For added realism, you want to shade in some shadows in the columns. You will need to do some basic perspective drawing, but that’s easy. Have fun.
Forgot to mention, when shading, the shadow is usually darker than what is in the shade. This will make your drawing more real.