Checker applies a two-color checkerboard pattern to the material.
The default checker map is a pattern of black and white squares. The component checks can be either colors or maps. This map can be previewed in the swatch preview.
Click the Click for Checker settings button. 
The map property settings specific to Checker are displayed. The
description of the settings can be found in the Checker
Property Settings under the MATERIALS
command.
An example of the Checker map is shown:
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