Technical discussions > Rendering

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

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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:

--- Quote from: Anindo Ghosh on August 06, 2021, 01:14:38 am ---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".

--- End quote ---

Thanks! This is very helpful!

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

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