Redshift 2.6.41 for maya2018 watermark removal

This version 10 There will be no watermark after the graphics card is cracked ;
20 There will still be watermarks after the graphics card is cracked ;

Solution ：
1、 First solve the watermark problem of rendered viewports ;
Follow the figure below from top to bottom , Just operate from left to right ; Finally, refresh the rendering viewport and select the newly created channel