Having the light effect from a backdrop but without its appearance in rendering

[TaChunHuang]

Sorry, been asking lots of questions recently...
I was wondering if it's possible to have the light effect from a backdrop but without its appearance in rendering? The reason is I would need a transparent background for the product that I am working on, but the product would appear too dark without the light reflection caused by the backdrop. Any clues? Thanks very much!

[Anindo Ghosh]

To get an effect similar to a backdrop for fill light, you could try using an area light where your backdrop would go. Set the power of the area light a couple of stops lower than your key light, and disable "visible to camera" and "visible in reflections".

[TaChunHuang]

To get an effect similar to a backdrop for fill light, you could try using an area light where your backdrop would go. Set the power of the area light a couple of stops lower than your key light, and disable "visible to camera" and "visible in reflections".

Thanks! This is very helpful!

[KristofDeHulsters]

Or you could add the image you want the reflections of to your HDRI. That might also work.