I've been using photoshop for a little while now, but I have yet to take ful advantage of masks. Normally I just create some sort of lasso and use that to isolate a section. However, I'm beginning to do some more detailed work, and I think that using masks would really help. Are there any good resources that you could recommend that might help me? Is there a way to save masks, so that you can use them again after making a new selection? Any help you could provide would be appreciated. Also, I'm mainly doing renderings of cars if that makes a difference.