You may be wondering what the point is of creating virtual glass. Well, just like in the offline world, glass is used when you want to protect something but still be able to see what lies underneath. Besides that, with a little imagination you can create some cool effects for enhancing your web presentations or games. As a practical example, we'll be creating an over-simplified version of a graphic which is taken from a real-world training product, just to get familiar with the concept but without a high...