If you exclude it from the light it will be very slow calculation

[flat]

Rendering is very slow if you exclude objects[ExldudedObj] from the light[KeyLgt] in the attached scene.

Is there a way to improve it? (do not want to hide objects)

tested with V-Ray 3.60 and NEXT.

[hristo.dimitrov]

After some tests, I can tell for sure that the issue is caused by the object named ExldudedObj.
But I will need more time to figure out what happens exactly and how to improve it.

[hristo.dimitrov]

Its look like a bug and I added it into our bug-tracking system, it's reference code is: VMAX-7320

[flat]

Thank you for the verification.