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mental ray shader for Maya (all versions > 6.5, all OS)
** Use it at your own risks **
This is a LENS shader that is used to remove the black squares due to a pixel that is not a number (floating point problems)
*** Especially usefull when using final gathering ***
How to know if you are in that case : if you increase the filter size
and your black squares increase too so you are in that case ! These pixels are replaced during rendering by the color in the parameters.