The 3D postcard is the simplest of the 3D mesh presets in Photoshop. 3D modeling is processor-intensive, so if you've seen a message when launching Photoshop about insufficient vRAM, you will not be able to work in 3D.
This feature works the same in Adobe Photoshop CS6 and CC versions. Photoshop CS5 also has 3D capabilities, but the interface has changed.
Kate Cahill is a graphic designer, writer, and creative director who has developed content for print and web. As creative director, she has produced award-winning work for agencies focused on the pharmaceutical and health and beauty aid industries. She has also served as production manager, with responsibility for the successful fulfillment of long-run print contracts. Kate has been delivering training for Webucator clients since 2010. Her enthusiasm for cutting-edge technology, combined with hands-on practical experience, brings an added benefit to her classes. Kate teaches real-world techniques and integration of Adobe software, as well as Microsoft PowerPoint, to produce a fully developed and cohesive brand identity.