OTOY Forums

Hi,
is there a way to hide some objects to the camera but not to GI?

I think what you are after is a reflection pass (where you see the objects reflection, but not the object itself). You can do this by enabling render layers. then rendering a Reflections pass (I think you need Alpha Channel enabled in the Kernel). See https://www.youtube.com/watch?v=ozW98ZjeXYM for details.

Paul

Hi Paul,
I have an interior scene enlighten by sun and sky. In the exterior part of the scene a put a plane to better light up the interior by the bounces of indirect light that come from the plane.
But in the final rendering I don't want to see this plane from windows because I want to put an image as a background.

Sorry for my english

Bye

Fabrizio

You can use diffuse material and set it to "shadow catcher" mode, or make it live geometry and set invisible to camera/shadows

Regards,
Mac

Thanks a lot Mac

Hi Mac,
i tried both methods but they seem not to work.

Hi

Check this out

This is normal This is live geometry : With this settings: Does exactly what you wanted.

Regards,
Mac

Mac, I think Fabrizio wants the reflections in addition to the emitted light. If not, then if it's an emitter, you can also set the material opacity to 0.

Paul

Hi to everyone,
the "problem" appear with glass. Take a look to the images. The first is with glass on the windows. The second is without glass.
In the first one I can see hdri and the plane (or the reflection of the plane?) on the exterior scene
In the second one I can see the background (as expected)
(light: hdri - background: RGB white)





So how can I avoid it?

thanx

the "problem" appear with glass. Take a look to the images. The first is with glass on the windows. The second is without glass.
In the first one I can see hdri and the plane (or the reflection of the plane?) on the exterior scene
In the second one I can see the background (as expected)
(light: hdri - background: RGB white)

Can you post a screenshot of the glass material setup pls?

Paul