Masking and clipping.
I don't wish to bore you with a "how to" here.
By the time I'd explained "how" you'd probably have gone to do something more interesting.
What I want to do, is show you what and why.
The puppy could be on any background. The puppy could be your product or other image.
Consider the possibilities for your promotions.
Hang on, two of the images look the same!
Do they? Look again. How is this done? Just what is that difference?
The difference is this: One image "sells" the other doesn't.
I know why. Do you? (It isn't just sharpness btw).
Website
