Probabilistic lights question

[Alex_M]

I've got a question that's bugging me a lately. Is there a reason why "Probabilistic lights" is on by default if this feature is used when there are a lot of lights in a scene (>50-100)? I would imagine that this will be a very small portion of scenes as most of the time people work with far less lights except for some rare occasions. I've found that 90% of the time this option introduces noise in my renders and I always turn it off. I sometimes even forget that it's on since it's hidden away of sight under the "advanced" mode and I'm going around searching what causes the noise in my scene then I remember that I forgot to turn Probabilistic lights off. So is there a reason that Probabilistic lights default to on? I'm really curious to know. Maybe I'm not using this feature correctly? Thanks in advance!

[Art48]

+1, also turning it off everytime. (Well, once, since I got a custom startup scene ^^)

[Alex_M]

So it's safe to say that it should not be used unless dozens or hundreds of lights are in the scene and there's no reason to be active otherwise?

[vraypixel]

I have noticed severe noise with this setting on and IES lights, so at least in this combination I never use it.
Last time I checked I was on Vray 3.2.
Hope it helps.

[Svetlozar Draganov]

V-Ray 3.x allows loading a default render preset for every new scene, just turn that option off save the preset and the feature will be always disabled for every new scene created.