How to Draw a Simple Optical Illusion: The Impossible Oval: Narrated – 3D drawing easyBy HTTH / May 10, 2019 How to Draw a Simple Optical Illusion: The Impossible Oval: Narrated – 3D drawing easy with this how-to video and step-by-step drawing instructions. How to draw 3D easy for beginners and everyone. Please see the drawing tutorial in the video below