The first try of drawing a 3D product.
Photoshop is usually use for fixing pictures,
it's the first time I use it to draw an true thing.
but the goal is learning using photoshop to display the light and shadow.
All the things is about light and shadow-- painting, photoshop, and photography.
I was very inexperience at first, but things get better later.
I felt a little catch the point, though some parts were still in a mess.
For example, the bottom was just seems like soft, rough and uneven.
I will get ahead, I just need more practice.