Photoshop CS3 and CS4 Extended allows users to place 3D models on a separate 3D layer, and then move or scale them, as well as change the lighting or render modes. Multiple 3D layers can be added to an image, and 3D layers can be combined with 2D layers to create a backdrop for 3D content, or to convert a 3D layer into a 2D layer or a Smart Object.

CS4 Extended added significant functionality, such as the ability to paint directly on 3D models, wrap 2D images around 3D shapes, convert gradient maps to 3D objects, add depth to layers and text, and achieve print-quality output with a new ray-tracing rendering engine. It also made it possible to edit, enhance and manipulate 3D images in a streamlined interface without the need for dialog boxes.

All that's great but where does the 3D imagery come from? Of course, you can create it yourself with a 3D application. But in some cases purchasing ready-made 3D models makes more sense. When it comes to plants, one source of 3D models is Xfrog, which specializes in organic plant modeling. While it provides the Windows-based Xfrog organic modeling and animation application for rolling your own trees and flowers, most Photoshop Extended users will find it simpler to make use of the firm's XfrogPlants Plant Library DVDs.

There are now 21 DVDs available for different regions and types of models, such as USA Trees, European Trees, Japanese Trees, Cacti and Succulents, Flowers, Shrubs, Houseplants and Underwater Plants. Each collection contains nine formats of 3D data, with 60 billboard renders, 60 perspective renders and PDF documentation in seven languages. The latest releases provide three titles in the Oceania series, with each including 180 3D models of Oceania plants, such as Baob, Coastal Wattle, Lemon Bottlebrush, Spotted Gum, Australian Tea Tree and Bread Palm. The obj and 3ds format images can be imported directly into Photoshop Extended.

Each of the three Oceania collections is priced at $199 and can be purchased on the Xfrog site.