Spectral iRay Render has Square Artifacts

united

You will notice 14 or so small square artifacts on Floyd's face. Also the harsh shadow line on the right side of his face.

Any thoughts on the cause of this?

Paintbox

It seems you are in interactive render, so you sure you not selected anything? Anyway, try rendering to "new window" to see if that fixes it.

If I read you correctly, it seems the hard shadow is the line from his sunglasses (light coming in from top casting shadow on the face)