Noise in render

[wegwegsgwerg]

Hi,

 

After adding my hdri map, my scene has a lot more noise (granted there was a bit noise before, but it was acceptable). Now this isn't a final render and I know it is very dark, but I'm hoping to nip this in the but now. Attached below is my scene with render settings, hopefully someone knows why my scene is so noisy. My noise threshold is only .002, so I'm not sure what's causing it. Originally, before adding my hdri map, a threshold of .006 was fine. Lowering the threshold to .002 has helped a bit, but not much.

 

Any help would be greatly appreciated.

 

 

EDIT: Not sure why my username is "wegweg sgwerg", lol wut?

 

EDIT 2: After changing my Light Cache subdivs from 1000 to 1300 and fiddled with my Vray camera, I believe there is slightly less noise, however I am not satisfied. There is still a lot of noise on the coffee table, as well as the window.

 

Edited April 5, 2014 by wegwegsgwerg

[Ismael]

Put the HDRI into a V-Ray dome light and increase sampling subdivisions to 301. Inspect the VrayLighting render element.

[wegwegsgwerg]

Thanks, I'm assuming you meant 30 subdivs lol?

 

Here's what it looks like now, changed a few GI settings around a bit.

 

Looks pretty good except for the window, perhaps changing the image sampler would help? I usually use Mitchell-Netravali but I believe that gave me some strong black lines surrounding everything near the window.

 

I'm still learning quite a bit, what image sampler would you recommend for such a scene?

 

EDIT: Catmull-Rom is giving me strong black lines as well, ya I know nothing about filters.

Edited April 6, 2014 by wegwegsgwerg

[Coolhand78]

the shadow subdivisions on your VRay sun are quite low maybe try upping them (24 would be a good start) you could try putting the HDRI into a vray dome light as suggested and using that as your main light source... also you might need to consider the quality of the HDRI that you are using...

 

if you want to fiddle with the AA you could try upping the DMC subdivisions too, there's a really good tutorial by John O'Connell on how to reduce noise and acheive predictable results... might help your situation here... http://vimeo.com/85982809

[wegwegsgwerg]

I used the hdri dome light method and I'm not sure of the quality of my hdri map. I've done some reading and it looks like my hdri map might be fine.

 

I also upped the DMC subdivs and actually scaled back the noise threshold even though still at .002.

 

Looks from a render so far now, things lok pretty good. Thanks guys, and thanks for the ref vid.