Guys
I have quite grainy internal base images at the mo. In my rQMC the noise threshold is at 0.01 Is this the best parameter to play about with to reduce the ‘noise’ throughout the image. I have some blotchy areas also…any ideas…My render time for the base scene at the mo is about 4 mins and dont really want to go higher than 7 mins per frame if I can help it?
Cheers
Sparky
a ss of your rendersettings and even an image of what your noise and splotches are would be helpful.
looks like noisy area lights would be my guess. try raising their subdivisions. Also if your using a fairly high quality irradiance map, try storing the lights with the irradiance map, that will definitely get rid of noise, but you might start to see some splotches depending on other settings. I’d recommend some searching of the forum, as this is a common issue.
Try raising your Global subdivs multiplier to about 8
How do you store the lights with the irradiance map? and would this dramatically increase the render time?
on the ‘quasi monte carlo GI’ panel??? or elsewhere?
tick “store with irradiance map” in the vraylight rollout 
on what part of the rollout??
Got it…will this dramaticallly increase the render time?
The global subdivs multiplier is in the rQMC Sampler rollout. Try setting it to about 4, re-render and see if it helps the noise. If so, try turning it to 8 and see if it eliminates all noise.
cheers…
Yeh, I have this at 10
Sorted…cheers and thanks very much guys…life-savers!!!
percydaman:
Also if your using a fairly high quality irradiance map, try storing the lights with the irradiance map, that will definitely get rid of noise, but you might start to see some splotches depending on other settings
I have never used “store with irr map before”.
What you are saying is that it is “good” to turn it on when using high settings of irr map?
Vray manual:
The result is that the irradiance map is computed more slowly but the rendering takes less time. You can also save the irradiance map and reuse it later
So when this is usefull to use? From what this sentance says I think that total time of rendering is going to be same? I mean render of static scene. And having less noice in the image is another benefit of it?
Maybe it is very usefull with animation.
Please more explanation on it :? .
PUTING THE CHECK ON STORE IN IRRADIANCE MAP IN THE VRAY LIGHT YOU WILL DECRESE RENDER TIMES A LOT BUT YOU WILL LOOSE ALL THE NICES AREA SHADOWS THAT LIGHT WILL DO WITHOUT CHEKING IT.
So it depends on scene?
When I have large open spaces interior or exterior, it is good to turn it on to save time when rendering and not taking care of details? It should be also usefull when doing test renders, I guess.
