This article explains Smart Objects in Photoshop and tells the different types of smart objects & how to create, edit, and convert them.

Use #photoshop to transform text and logos into captivating, cool 3D text effects. This comprehensive tutorial reveals powerful design techniques that give you total control over extrusions, lighting, ...

A smart object can be identified by the little box at the lower right edge of the object in the layers panel. How can I edit the pixels of a smart object in Photoshop?