| Hi Are. What’s lighting your scene? If it’s just the 2 luminous orbs, then it won’t penetrate through your glass shader. If properly setup as glass (100% Fresnel reflection) then all the light from the orbs is hitting the glass at a glancing angle and will bounce. Also if light is penetrating the glass from another light source or from GI, it may not have enough bounces to return out from the robot again. Try placing some random object inside of the robot, near the glass. Is it visible in the render? That would mean at least some light is getting in there…
jonah |