Hide to camera

[fabrizio_s]

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

[face_off]

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

[fabrizio_s]

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

[formatio]

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

[fabrizio_s]

Thanks a lot Mac

[fabrizio_s]

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

[formatio]

Hi

Check this out

This is normal

normal mode

This is live geometry :

live geometry with settings

With this settings:

settings

setings.JPG (21.59 KiB) Viewed 4873 times

Does exactly what you wanted.

Regards,
Mac

[face_off]

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

[fabrizio_s]

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

[face_off]

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