Making a light invisible but keeping reflections?

[puppydust]

I'm trying to create a fake reflection for a layer that will be composited later on. Is there a way to make a light invisible but hide the reflection?
In the first screenshot you can see the white ellipse which is the light source, it's got the reflection going on in the floor layer. Looks great!

Now I want to make the light invisible. Checking off camera visibility on the light layer works, but as you can see it obstructs the natural reflections on the layer underneath it, leaving a funny black ellipse.

Is there another way to get round this? If I dial down the opacity parameter on the octane light tag it keeps the light illumination but the reflection vanishes. Any ideas?

[itsallgoode9]

just taking a guess but does turning off "shadow visibility" fix the problem?

[puppydust]

I tried that and it does not sadly

[puppydust]

Or to put it another way, is there I can make a light 'ignore' a certain object?
I'm thinking I could position the light inside my phone object and set it to ignore the phone object so it shines through. is this possible? In standard C4D I could use the compositing tag for this I believe.

[Zay]

Shadow visibility doesn't work if the light is too close to an object - sadly. So either pull the light away from the object or render 2 images where you have it on Opacity 0 and 1 and photoshop it.

[Terryvfx]

Isn't there an option called "camera visibility"? you should uncheck that.