This movie was dedicated to partially hiding Claw's face, mainly from the eyes up. However, there are 2 instances where they accidentally fail at this. The first is when Claw is at his Bowlrite lair. As he exclaims that they will build a super weapon, the light reflecting off his claw shines on his face thus removing the shadows & exposing him right before he begins to explain his plan.
This occurs again when the Gadget and G2 arrive at the Reserve. When Claw dragged Penny towards the Ice Cream Truck and calls for Brick & McKibble, the camera goes too low and accidentally shows us a good side-view glimpse of his face.