Bip77, well I gave it another shot using four extra lights, instead of just the one from the front, with the color set to grey and intensity cranked down to 15. I lined them up so that the highlights on the ball was sort of dispersed across the face of the ball, and then rendered. The hightlight is there but so faint it may get by. You still get specular highlights but so faintly that it is hard to tell. Maybe with a few more lights added this way you could raise the illumination to the point desired without increasing the highlighting on the ball.