Color Threshold vs. Noise Threshold

[bernhard]

Howdy Howdy... I need some clarification on that topic.

Can I use the Noise Threshold & the Color Threshold in combination when using the Adaptive DMC ?

VIDEO is here:
https://www.youtube.com/watch?v=BO7A6vRnClo


like always, thanks for any little help !

[vlado]

For V-Ray 3.20, I would recommend to leave the DMC noise threshold to its default value of 0.005, and only work with the color threshold.

Best regards,
Vlado

[bernhard]

thx vlado. but one thing that still is not 100% clear for me. If I use the Noise Threshold value like you recommend with 0.005 .. and let's say I use the color Threshold with 0.1 ... does the color threshold override the noise threshold ? Is the Color threshold dominating or ruling over the noise threshold ?

I am refering again to my short video, that takes just 5 minutes in which I try to lay out this very important questions.

like always... any little help highly appreciated ! thx !!!

[vlado]

The color threshold is for AA samples when V-Ray compares adjacent pixels.

The DMC threshold is for secondary effects, like GI rays, glossy reflection rays, when V-Ray compares the values of the samples computed at a single shading point.

If you look at the graphic here:
http://docs.chaosgroup.com/display/V...tive+sampling#

the AA threshold is used for the top row of samples (the image samples), while the DMC threshold is used for the bottom row (lights/materials/gi). Does that make sense?

Best regards,
Vlado

[Morbid Angel]

Because dmc threshold is not a simple value of 0-1 quality if you will imho, its a balance from shader/light subdivs. AA is almost like a hard value on top of that.