After I've made the new nav bar for my site, I've decided to wirte a tutorial on how to make my style of nav bars.
1. Draw the outline of the shape of your nav bar. Make their height high. I use mine as a rectangle.
2. Cut the corners of the shape diagnally. This will create the mechanical shape.
3. Carve a hole on the interior and make the shape the same as your navbar's outline's shape.
4. Add details especially wires, engines, mechanical stuff, etc.
5. Flesh in the flat colors for the parts.
6. Apply tone to it. Vary the hues of the shades. The tones should have high contrast so the navbar's parts appears 3d. When shading the parts, you should apply plenty of details to the shading. Having details of the shading will make the nav bar not look like those hi-res images and get smaller shading areas.
7. Illuminate it. Giving it bright highlights is our goal now.
8. Finally, our last step is to add reflections to the glass.