Randomly disturbs the material by mixing two input attributes,  and , to create an effect resembling stains or clouds.  includes  attributes you can use to control the effect. See also Crater. 
         
         Find this texture in the Create bar. To apply this texture as a texture map, see Map a 2D or 3D texture. 
         
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                   Increase this value to add more detail to the default  attribute setting (as though it has been shaken up). If used as a bump map, increase the value to increase the number of
                     bumps and valleys. 
                   
 
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                    The two channels through which information such as color values passes. You can also supply information to the channels using
                     a three-channel (RGB) mapping. 
                   
 
 
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            Note 
                    and  only have an effect if the  attribute is connected to the  attribute of a shader. 
                  
 
                
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                      Controls the depth of the bumps when the texture is used as a bump map. Increasing  deepens the bumps. 
                      
 
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                      Controls the softness of the bump edges when this texture is used as a bump map. Increasing  softens the edges. Animate this texture to simulate a melting stucco surface.