One new feature in Photoshop CS3 and CS4 is the support for 3D objects and the ability to rotate and scale them in 3D.  One use for this, which I have to admit I hadn’t considered before, is using it with 3D model libraries (like 3DVIA) to create true 3D brushes you can easily replicate through scenes.

I wanted to create a large number of new Photoshop brushes but finding the right image and having to cut, crop, and crunch the pictures became painful and boring. Thinking a bit outside the box led me to a whole new dimension in brush making. Why not use 3D models to quickly create Photoshop brushes ?!?!

Full tutorial on their site.

via 3D: A Whole New Dimension In Creating Photoshop Brushes | 3DVIA 3D Model Blog.