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This page exists within the Old ArtZone Wiki section of this site. Read the information presented on the linked page to better understand the significance of this fact.

Refraction Channel

Light rays bend when passing through objects of differing densities. For example, light bends when it passes through air into water. Refraction makes objects appear as though they are in a different location than they really are because of the bending effect. The Refraction channel controls the surface light bending.

When you add refraction strength with a numerical value, an image map, or a combination of both, one of two things can happen at render time:

  • If you use a refraction map, DAZ Studio uses that map as a cubic environment map.
  • If you do not specify a map, DAZ Studio will invoke the raytracer to use surrounding materials in the refraction calculations.

surftab_refraction.jpg

You have the following options when working with this channel:

  • Color: Click on the Color Selector to open a standard Color Picker and select any color to set as the refraction color. Keep in mind that light can sometimes change color as it bends - think of white light passing through a prism. The refraction color multiplies through any map you might apply, which means that the base color will blend through the map.
  • Color Image Map: To assign a texture map that defines the refraction color, click on the field to display a menu where you can select a texture from the list or browse for a new texture. If no texture is assigned, an arrow will be available to the right of the color selector. A menu prompts you to browse for a new image and displays images that are already present in your scene.
  • Strength: The Refraction Strength slider controls how much the light bending effect, or the index of refraction, is evident. A setting of 0% means that the refraction is not visible, while 100% means that the refraction effect is fully visible
  • Strength Image Map: To assign a texture map to control the strength of the refraction with an image map, click on the field to display a menu where you can select a texture from the list or browse for a new texture. If no texture is assigned, an arrow will be available to the right of the color selector. A menu prompts you to browse for a new image and displays images that are already present in your scene.
  • Index of Refraction: This setting determines the amount of bending that occurs when light passes through the object. Higher settings create more bending. The following are some refraction indices for some common materials:
    • Perfect Vacuum: 1.00000
    • Air (at sea level on a calm day): 1.00029
    • Ice (frozen clear ice): 1.31
    • Water (at room temperature, or 20 degrees Celsius): 1.33
    • Acetone: 1.36
    • Sugar solution(30%): 1.38
    • Sugar solution (80%): 1.49
    • Sodium chloride (salt): 1.54
    • Polystyrene: 1.55-1.59
    • Sapphire: 1.77
    • Diamond: 2.417