Can I add The Light to Trace Set in VRay Next?

V-Ray V-Ray for 3ds Max General
1

I want to control reflections on a per-object basis.

Can I add The Light to Trace Set in VRay Next?
It does not work when added with the vrayAddTraceSets command.

2

If you wish to add trace sets to an object via MaxScript, use the following commands in the MaxScript Listener:

m=vrayAddTraceSets $ --this would add trace sets to the selected object; you can replace $ with $Sphere002 to add an object for example

showproperties m --this shows the available properties of the trace set

m.reflect_exclude=#($VraySun001,$VrayLight001) --set light names in the brackets
m.refract_exclude=#($VraySun001,$VrayLight001)
m.reflect_exclude_type=0 --0 is exclude; 1 is include
m.refract_exclude_type=0

Example script, which includes only the sun in the reflections of an object:

m=vrayAddTraceSets $Teapot001
m.reflect_exclude_type=1
m.reflect_exclude=#($VraySun001)

3

thank you for the advice.

I said vrayAddTraceSets command doesn’t work.
This means that VRayLight is not excluded in Exclude mode.

In Include mode, VRayLight becomes invisible (opposite meaning), but nothing is reflected.

Probably a bug.

Confirmed with V-Ray 4.20.01 3ds Max 2020

exclude_light.jpg
exclude_light.jpg722×582 74.6 KB

4

Another question

Can I exclude V-RayLight using Trace set when Glossiness is 1.0 or less?

There is no way to disable V-RayLight’s Fake Spacular on the material side.

5

My bad, the solution used to work for V-Ray 3.6, however, it seems that it does not in V-Ray NEXT. Thanks for the report. I have forwarded the information to our developers for further analysis.

6

I had the same issue few months back ,and I’ve posted a scene too with comparison if that will help..please higher the priority of this
https://forums.chaosgroup.com/forum/…exclude-lights