I want a mash was able to catch light but was invisible on render. I want this effect to happen, but the plane was invisible. Is it possible? Or can I cast colored shadow? I need this in cycles. This question is not about "how to make an obect invisible" it's about how to make in catch light.
I need this happen
How can I get light accents without white face??? Do you see that light distributes unequally on shaped objects, how can I get only light fingerprint on transparent background?