Adobe Photoshop CS4 - Manual (Page 594)

587 USING PHOTOSHOP CS4
3D and technical imaging
Last updated 1/10/2010
Environment Stores the image of the environment surrounding the 3D model. Environment maps are applied as
spherical panoramas. The contents of the environment map can be seen in the reflective areas of the model.
To prevent an environment map from reflecting on a given material, change Reflectivity to 0%, add a reflectivity map
that masks the material area, or remove the environment map for that material.
Normal Like a bump map texture, a normal map increases surface detail. Unlike a bump texture map, which is based
on a single-channel grayscale image, a normal map is based on a multi-channel (RGB) image. The values of each color
channel represent the x, y, and z components of a normal on the model surface. A normal map can be used to smooth
the surfaces of low polygon meshes.
Note: If a 3D object has more than the nine texture types Photoshop supports, additional textures appear in the Layers
panel and the 3D Paint Mode list. (To display the latter, choose 3D > 3D Paint Mode, or use the Paint On menu in the
Scene section of the 3D panel).
Save or load a materials preset
Material presets store all texture map settings. Photoshop Extended stores materials presets in P3M files. A variety of
these files are installed by default, letting you quickly apply popular texture types like steel, fabric, and wood.
• To save current texture map settings, choose Save Material Preset from the 3D panel menu.
• To load a saved preset, choose Replace Material from the 3D panel menu.
Create a texture map
1 Click the texture map menu icon next to the texture map type you want to create.
2 Choose New Texture.
3 Enter the name, dimensions, resolution, and color mode for the new map, then click OK.
To match the aspect ratio of an existing texture map, view its dimensions by hovering the mouse pointer over the
map name in the Layers panel.
The name of the new texture map is displayed next to the texture map type in the Materials panel. It is also added
to the texture list under the 3D layer in the Layers panel. The default name is the texture map type appended to the
material name.
Create a bump texture map
A bump texture map filled with a neutral grayscale value provides more range when painting on the map.
1 In the Tools panel, click the Set Background Color swatch.
2 In the Color Picker, set brightness to 50%, and set R, G, and B values to equal values. Click OK.
3 In the 3D panel, click the texture map menu icon next to Bump Strength.
4 Choose New Texture.
5 Choose the following settings in the New dialog box:
• For Color Mode, choose Grayscale
• For Background Contents, choose Background Color.
• (Optional) Set Width and Height to match the dimensions of the diffuse texture map for the material.
6 Click OK.
The bump texture map is created and added to the texture map files listed in the Materials panel. It also appears as a
texture in the Layers panel.