Iray render issue when character is in water

stryfe

Working on a render with G8F in water but the part where the water intersects the body is checkerboarded.  This is not visible in the Iray preview, only on the finished render.  Any assistance will be greatly appreciated.  Thanks.

Serene Night

looks like that area may have rendered transparent. If you layer it over something a similar color it will not be visible in photoshop. Not sure why, but have had that happen before with water planes