3 D files in Photoshop (Photoshop Extended)

Place 3D objects in an image (Photoshop Extended)
You can place a 3D model against a background image and change its position or viewing angle to match the background.
For a video on mapping 2D images onto 3D models, see www.adobe.com/go/vid0020.
Open the file you want to serve as the backdrop.
Open the 3D file.
Drag the 3D layer from the 3D file from its Layers palette into the background image window to add the 3D layer to the background file.
Choose Layer > 3D Layers > Transform 3D Model or double-click the 3D layer in the Layers palette and use a 3D Tool to position or scale the 3D model against the background.

Opening 3D files (Photoshop Extended)
You can open a 3D file or add it to an existing Photoshop file as a 3D layer. When opening a 3D file, you will need to set a height and width for the file. (3D models can be scaled to any dimension.) When adding a file as a 3D layer, the layer will use the dimensions of the existing file. A 3D layer contains the 3D model and a transparent background.
Do one of the following:
Choose File > Open.
With a document open, choose Layer > 3D Layers > New Layer From 3D File.
Choose from the several 3D model templates available.
If opening a 3D file outside an existing image, set image file height and width and click OK.
Like vector art, 3D models can be scaled up or down without losing detail or quality. Setting larger or smaller image dimensions will scale the model up or down proportionately to fill the image frame.
Note: A 3D layer does not preserve any background or alpha information from the original 3D file.