Adobe Photoshop CS4 - Manual (Page 595)

588 USING PHOTOSHOP CS4
3D and technical imaging
Last updated 1/10/2010
Open a texture map for editing
❖ Click the texture map menu icon and choose Open Texture.
The texture map opens as a Smart Object in its own document window. After editing the texture, make the 3D
model document window active to see updates to the model. See “
Create and edit textures for 3D models
(Photoshop Extended) ” on page 590.
Load a texture map
You can load an existing 2D texture file for any of the nine available texture map types.
1 Click the texture map menu icon next to the texture type.
2 Choose Load Texture, then select and open the 2D texture file.
Delete a texture map
1 Click the texture map menu icon next to the texture type.
2 Choose Remove Texture.
If the deleted texture is an external file, you can reload it using the Load Texture command from the texture map
menu. For textures that are internally referenced by the 3D file, choose Undo or Step Backward to restore a deleted
texture.
Edit texture properties
A texture map is applied to a particular surface area of the model, depending on its UV mapping parameters. You can
adjust UV scale and offset if necessary to improve how the texture maps to the model.
1 Click the texture map menu icon next to the texture type.
2 Choose Edit Properties.
3 Choose a target layer and set UV Scale and Offset values. You can enter values directly or use the scrubby sliders.
Note: Change the UV Scale and Offset settings only if a model has incorrect UV mapping.
Target Determines whether settings apply to a specific layer or the composite image.
U and V Scale Resize mapped textures. To create a repeating pattern, decrease the value.
U and V Offset Reposition mapped textures.
More Help topics
“ Create UV overlays ” on page 592
3D Lights settings (Photoshop Extended)
3D lights illuminate models from different angles, adding realistic depth and shadows. Photoshop Extended provides
three types of lights, each with unique options:
• Point lights shine in all directions, like light bulbs.
• Spot lights shine in a cone shape, which you can adjust.
• Infinite lights shine from one directional plane, like sunlight.
To position any of these lights, you use tools similar to those used for 3D models themselves.