Rendermask with white (or other background other than black)

[BeneZ]

Hello,
the Rendermask (with Object-ID for example) is good, but it would be great, if (also for final renders) the background could be choosen.
The Environment background overrides do not work with it.

[yolov]

Do you mean rendering everything except the background?

[BeneZ]

I mean, when I render for example a single element, then I would like to have the choice to put it over a custom color, currently it only stands on black.
In the same manner, like I can choose the default environment color of the camera.

I had the situation, that I wanted to show quickly different versions of an white object in a bright scene. But this object was always placed on black and got a dirty edge.
If I could have choosen, that the render mask gives me that object on a different brighter color, it would have been great.
- It means the ability to choose the default background color behind the rendermasked element.

- It also could be in special cases maybe helpful, if it's possible to extend the rendermask a bit, to get a bit bleed (like for example 5 pixels more) around the rendered object.
That's in case someone wants to composit it into the already rendered background of a scene - and the border edges should match correctly with the rest of picture.
Provides the ability to render out quickly versions, which perfectly integrate into the whole picture.

[yolov]

OK, that makes sense. Would it help if the background texture override (overrides tab > override environment > background) showed through instead?
I'll make a note for the edge bleeding.

[BeneZ]

Thanks for reply!
When this changes the scene lighting, because it automatically also activates GI texture and reflection/refraction textures, it wouldn't be so perfect for getting an element of the scene rendered out.
But if it would be possible, ONLY to override the beckground without affecting GI/reflection/refraction, this would be great.