Find a nice picture of a car, a google image search is a good place to start.
Grab your polygonnal lasso tool, select around the edge of one of the windows. Zoom in (control + +)to get as close as you can to the edge. Your selection should look like below..
Once you have it selected, go to Image/Adjustments/Brightness-Contrast and lower the brightness all the way. Click ok and you can deselect.
Repeat the steps and you'll be able to do all the windows of the car! Here's how mine looks in the end..
I hope you've enjoyed this tutorial,
