Chris Heuer (jonas)

12 replies · posted

Make Light Affect one object but not another

I am trying to make a Photo-real wine bottle and am having one issue with lighting it.  The foil on the top pf the bottle is dark, when I add a special light to bring it up, it reflects in the bottle.

I can't turn off "Glossy" in the Cycles settings under the Object tab because glossy is what is lighting the foil.

Is there a way to have the light illuminate the foil but not affect the bottle at all?

Sorry for the inaccurate Sub Category choice.  None seemed to fit

  • Is your goal to create a photoreal image ?

    If so, you can separate the foil from the bottle to separate render layer. You can than join those two layers in compositor.

  • Hello Chris, realistically, if there is a light, it should reflect in the bottle. What I would do is change the material of the foil, because it shouldn't be so dark in the first place. 

    What you ask for CAN be done with Render Layers, like Palo said, but it will look unrealistic.


    • spikeyxxx I thought about that but I am working off of actual bottles & photos from the winery.  The material is behaving very closely to the actual foil under various lighting conditions, so that part is good.  If I pump up the side lights, the foil looks perfect but the highlight on the bottle is stronger than the client wants.

      CG lighting cheats so many actual laws of lighting, I was hoping I could easily turn off the reflection in this instance.

      Would Object Identifiers help?  Can I make a light that only effects the object it's assigned?


      C

  • Hi Chris, I've tried to reproduce your problem, but I couldn't (see bad picture). 

    I still say that the problem lies in your foil material.(Maybe just increase the value?) 

    What Palo was saying is that you should exclude the foil and light layer from the bottle layer (see screenshot).