Selected object won't render

[Streetwise]

I have a scene where I'm trying to render a few selected objects, including a white background. If I use IPR, it looks great, but when I go to do a production render, the background renders as black. Super annoying. No matter what I try, I can't get the background to render like it should when using Render mask Selected.

[hermit.crab]

Presuming you're using the IPR debug shading to isolate the objects, yes, the background would be there. Render mask selected, however, works in a different matter and is meant for other procedures (i.e. re-rendering a specific object on-top of an already completed render), You can render your scene with the black background, take the alpha and use it as a mask in a simple composition with a white background

[Streetwise]

You can render your scene with the black background, take the alpha and use it as a mask in a simple composition with a white background

Thanks for that! That is exactly what I ended up doing and it worked fine. Much appreciated.