Holdout support

[Dade]

Added the support for holdout, see https://github.com/LuxCoreRender/LuxCore/issues/423 for some detail.

[CodeHD]

This sounds like a great feature!

How is it going to behave in combinations? For example, a holdout material behind glass?

I can imagine to place it behind a window, so that you get the glass reflections from inside the room and the remaining transparency to make an "overlay" with another video that shows the outside.

[Dade]

How is it going to behave in combinations? For example, a holdout material behind glass?

I can imagine to place it behind a window, so that you get the glass reflections from inside the room and the remaining transparency to make an "overlay" with another video that shows the outside.

At the moment, the red suzanne (the demo scene in linked issue) would be visible trough a glass (i.e. the holdout object is normally visible in anything but first path bounce). I assume this is the expected behavior but can be changed

[lacilaci]

This is super nice to have, thanks

[SteffenD]

Very nice and useful. But are there plans to also support the Collection "Holdout" property (or what it might be called):


This is already working in BlendLuxCore for "Indirect Only" right next to it.

[B.Y.O.B.]

Yes, it's planned.