I'm a developer trying to strengthen my design skills. The problem lies with my expertise being in code versus design. So my question is, when creating a theme to sell, and the focus is the functionality and features of the theme - are the graphics in a theme (whether it's Tumblr/WordPress etc.) all created by the person who made the theme?
Or can I use stock images/free graphics for themes that I build and then sell?
Thanks for any help in advance.