I just spend a lot of time in front of computer. XD I won't necessary ruled that pixelling is hard. EVERYTHING have its own challenges, it really depends on the person and how WELL they want to do it. When you feel the task is hard, which mean you are challenging your limit, and could ensure a breakthrough when you overcome it.

http://www.mlo.me/upen/v/201006/7-Hi...es-29747-1.jpg The bestest I can find.
http://www.spirithalloween.com/image...eractive.a.jpg
They feel like the same shoe. Anyway, notice how the shape follow the shoe 'pad' above?

well... I am kind of a person that wish to get the words/vocabulary/description right... that still look to more GLOSS than glass. Unless you are arguing the fact that the glass is opaque, non transparent. XD