Glow Effects behind glass

[damaggio]

I've noticed that the Glow Effects if behind glass with small refraction glossiness you will need to crank up the glow effect way higher, is there a way to avoid this since one might have other light sources in the scene that are not behind glass?

Dec 31 build Vray 5 windows 10

[hermit.crab]

I just tested this on a simple scene, and the pixel value differences are minimal if the glass has a white reflection and glossiness 0.98. Less reflection and glossiness, of course, reduce the visibility of the light, hence the need for more intense lens effects. Maybe it's something specific. Could you attach (or send) or send the scene so we can take a look?

[intercard]

Hey bro !!

Have you tried lowering the threshold a bit? For example to 0.75 value or increase the light multiply or the size the light?

I’m not are sure but maybe the refraction of the material decreases the value of the pixel float that the glare needs to do the calculations..

hugs

[damaggio]

Hi Aleks and Carlos, thanks for the replies, I just sent a simple scene to Support, couldn't lower to 2MB to attach here.
I did this render just now, I was just not expecting to have to keep tweaking bloom levels again to match more or less the lamp on the left, I'm aware that the glossiness is having an impact here
but wasn't expecting this much difference ( how about a check box for transparency glossiness in the future for bloom effects?)
The renders are in CPU.

[hermit.crab]

Thanks for the provided scene. The difference stems from the volume of the glass object. Tracing refractions of volume objects (as opposed to single-planes) triggers the Max. Ray Intensity, which suppresses the lighting contribution to the set threshold. Additionally, each ray trace introduces some energy loss.
Usually, the max. ray intensity's effect is not that visible, but in your scene, the lights have a humongous multiplier. You can resolve the issue by either normalizing the lights' multiplier value or reducing the glass to a single plane.

[damaggio]

Hi Aleks, thank you for the information you advised, I resolved the issue by saving a Bloom preset for this type of scenario and I can finish some final images now.
Cheers.