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Today I installed Vray 3.3 (3.30.04) for the first time. coming from Vray 3.2. I´m currently testing all the feature before switching completely. I´m running into various problem whens I turn on "Clamp Output" (wich I use frequently) . It seems to happen especially with adaptive AA. I have a fresh scene lit by a Vraylight and a VraySky. Settings are pretty much out of the box.
This is the image rendered without clamping on the left and with clamping on the right
The first obvious difference is a much stronger noise (while it also renders much faster). The noise get´s even stranger when I turn down the color threshold of Adaptive Sampler
The noise get´s less when I turn up the min subdivisions of the adaptive sampler. In previous Vray versions you could have turned clamp output on a render with min/max settings of
1/x pretty much noise free. That wouldn´t really be the problem as it still renders quite fast even with min subdivs larger that 1. But as soon I have min values of 2 or higher the max value is
completely ignored. I get the exact same render time and image quality when I have a setting of min/max 4/24 compared to 4/10 or even 4/100. No difference.
Also there is a second problem. When you look at the unclamped and clamped image notice the blue from the sky is neary gone in the clamped image. The bleeding on the wall as well as the reflection on the floor is gone. When clamping is on I need to turn off divide shading subdivison as well as tunring on use local subdivisons for the blue to come back.
It´s pretty weird. I hope it´s just a bug.
This is the image rendered without clamping on the left and with clamping on the right
The first obvious difference is a much stronger noise (while it also renders much faster). The noise get´s even stranger when I turn down the color threshold of Adaptive Sampler
The noise get´s less when I turn up the min subdivisions of the adaptive sampler. In previous Vray versions you could have turned clamp output on a render with min/max settings of
1/x pretty much noise free. That wouldn´t really be the problem as it still renders quite fast even with min subdivs larger that 1. But as soon I have min values of 2 or higher the max value is
completely ignored. I get the exact same render time and image quality when I have a setting of min/max 4/24 compared to 4/10 or even 4/100. No difference.
Also there is a second problem. When you look at the unclamped and clamped image notice the blue from the sky is neary gone in the clamped image. The bleeding on the wall as well as the reflection on the floor is gone. When clamping is on I need to turn off divide shading subdivison as well as tunring on use local subdivisons for the blue to come back.
It´s pretty weird. I hope it´s just a bug.
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