Nature can always play an important role in your designs, even if it’s a matter of displaying something that’s already been created and finished. Take this inspiring business card mockup bundle for instance. It doesn’t feature those flat white stones and the shadow for nothing.
They are there on purpose, to set the mood, make it all seem more aesthetic, and at some points, even help with the arrangement of the items in the scene. Plus, since you’ve got 5 PSD options here, you get to decide whether you want to have only a single copy of your business card demonstrated or a whole pile of them.
