Parabolic Mirror - reflected beam not visible in volumetric environment

[J@R]

I'm trying to visualise a light beam as it should bounce off a parabolic mirror. The image (sorry for the quality) shows two lights (spotlight and plane light) shining into the centre of a parabolic mirror and reflecting light onto the surface directly above. As you can see the reflected light on the surface above the mirror appears correct, although I would expect it to be a bit sharper.

What I'm struggling with is getting the beam to show up in the volumetric environment the same way as the original lights. Is there a setting I'm missing? Is this possible in V-Ray. I'm using V-Ray Next for Rhino 6.

Edit: I'm not certain this is how it should work in real life so please correct me if this is impossible.


Actual render



Desired render with beam visible (different colour to highlight)

[georgi.georgiev]

Hi,

Apologies for the late reply!

Kindly note that it is necessary that the Photon Mapped Caustics are enabled in this case.
For more detailed information, please visit https://docs.chaosgroup.com/display/...MappedCaustics

Another workflow to achieve the desired effect is to fake it with an additional V-Ray Light