Adobe Photoshop CS4 - Manual (Page 593)

586 USING PHOTOSHOP CS4
3D and technical imaging
Last updated 1/10/2010
You can create, load, open, remove, or edit the properties of texture maps using the texture map menu next to
each texture type. You can also create a texture by painting directly on an area of the model. See “ Paint on 3D models
(Photoshop Extended) ” on page 593.
Note: Depending on the texture type, you may not need or want a separate 2D file to create or modify a material’s
appearance. For example, you can adjust the Glossiness, Shininess, Opacity, or Reflectivity of a material by entering a
value or using the scrubby slider controls next to those texture types.
Ambient Sets the color for ambient light visible on reflective surfaces. This color interacts with the Global Ambient
Color for the entire scene. See “ 3D Scene settings (Photoshop Extended) ” on page 583.
Refraction Sets the refractive index, when Face Style rendering is set to Ray Traced, and the Refractions option is
selected (3D > Render Settings, Face Rendering section). Refraction is the change in light direction that occurs at the
intersection of two media (such as air and water) with different refractive indexes. The default value for new materials
is 1.0 (the approximate value for air).
Specular The color displayed for specular properties (for example, highlight glossiness and shininess).
Diffuse The color of the material. The diffuse map can be a solid color or any 2D content. The Diffuse color swatch
value sets the diffuse color if you choose to remove the diffuse texture map. You can also create a diffuse map by
painting directly on the model. See “
Paint on 3D models (Photoshop Extended) ” on page 593.
Self-illumination Defines a color that doesn't rely on lighting to display. Creates the effect that the 3D object is lit from
within.
Bump Strength Creates bumps in the material surface, without altering the underlying mesh. A bump map is a
grayscale image in which lighter values create raised surface areas and darker values create flatter surface areas. You
can create or load a bump map file, or begin painting on the model to automatically create a bump map file. See “
Paint
on 3D models (Photoshop Extended) ” on page 593.
The Bump Strength field increases or reduces bumpiness. It is only active if a bump map exists. Enter a number in the
field or use the scrubby slider to increase or decrease bump strength.
Bumpiness is most pronounced when a surface is viewed head on, rather than at an angle.
Glossiness Defines the amount of light from a source that reflects off the surface and back to the viewer. You can adjust
glossiness by entering a value in the field or using the scrubby slider. If you create a separate glossiness map, the
intensity of colors in the map controls glossiness in the material. Black areas create full glossiness, white areas remove
all glossiness, and middle values reduce the size of a highlight.
Shininess Defines the dispersion of the reflected light generated by the Glossiness setting. Low shininess (high
dispersion) produces more apparent light, with less focus. High shininess (low dispersion) produces less apparent light
and brighter, crisper highlights.
Adjusting Glossiness (left number) and Shininess (right number)
Opacity Increases or decreases opacity of the material (0-100%). You can use a texture map or the scrubby slider to
control opacity. The grayscale values of the texture map control the opacity of the material. White values create
complete opacity and black values create complete transparency.
Reflectivity Increases the reflection of other objects in the 3D scene, and the environment map, on the material
surface.
0% / 0% 100% / 0% 0% / 100% 50% / 50% 50% / 100% 100% / 50% 100% / 100%