Any Way to Catch Reflections?

[BigAl3D]

The shadow catcher material is great and has many ways to utilize it. The way I'm using it right now is to render my object with its shadow baked in, which makes it cleaner to just have the on object with the shadow already there so you don't have to export a separate layer.
 
What would be even better is to also have the object's reflection captured also. In my case, I have a flat floor, but it is pretty reflective, like polished marble. Having the shadow with the object allows the flexibility to make small adjustments it the object's position or size in compositing. Since I don't know how to capture the reflection, I've had to resort to baking the shadow into the floor and have the object on its own layer. This is to allow other objects and people to be placed behind the object. And by rendering the shadwo into the floor, it also has the reflection of the object, but this almost eliminates the ability to make adjustments later.

Anyway, it would be nice if we could have an option for a Reflection Catcher material. ha.

[davetwo]

But thats already there... (see attached).
Or am I missing something?

[BigAl3D]

Apparently I AM missing something. ha. Or maybe that feature was broken in the past and I never went back to it. Not sure. Anyway, in this shot, the top is a typical way I had used Shadow Catcher. The below is the same thing, but Reflection is turned on. It's close, but how can I have just the car in the reflection so it looks more like the top example?

[romullus]

If you're rendering shadowcatcher in "for compositing" mode, don't forget that you need to save and compose it linearly, otherwise you will get wrong result, similar to what's in your example's lower part. Here's how it looks if you do it wrong (on the left) and right (on the right).

[BigAl3D]

Thanks for that info. So I need to make sure the project is set to Linear color space instead of sRGB? Also, would I need to save as a higher-bit file like PSD or maybe EXR? I don't have much experience with Linear workflows to be honest, so if you can elaborate, that would be very helpful. Thanks.

[romullus]

You don't need to set your project in any special way, you just need to save the output image in linear format - EXR is perfect for that, not sure about PSD, i don't have photoshop - and also make sure that in your compositing software you are working in 32 bit format. If you'll meet those two conditions, everything else should work correctly. By the way, when saving to EXR, you can choose either 16 bit, or 32 bit, either will work just fine, as they're both linear. I prefer 16 bit as it's more economical.