A free program for Android, by Creative Studio A.
How to Draw 3D is a simple yet comprehensive drawing tutorial app. This step-by-step tutorial will teach you how to draw a variety of 3D objects in an anamorphic style.
An anamorphic drawing is a special type of perspective that creates a distorted image. In this case, the distortion is in the shape of an object, and the effect is especially strong when viewed from a distance. You can use this type of perspective to create various optical illusions. The most common is the anamorphic mirror, also known as the spiky ball, but there are many other types of optical illusions that you can create.
This app is a useful tool to create these types of optical illusions in real life. You can also use this tool to practice your drawing skills.
