How to get rid of noise

[dreamspace]

Does anyone know how to get rid of noise? I've set the Vray denoise option as far as it will go yet I still get noise. Any advice is greatly appreciated.

Using Vray 3 and Sketchup 2017. Macintosh computer.

[peerman]

Did you have a look in the denoise channel? That's where the denoised image is. (top left corner of the vfb, click on RGB and choose denoised).

Best,

[dreamspace]

Thanks for your response. I did use the denoise filter set as high as I could go. I discovered when I added brighter lights the noise was greatly reduced. Unfortunately, that was was not my intended rendering result. I was hoping to keep the room fairly dark and use the sunlight streaming in to light the room. Any further advice would be incredibly helpful.

[Brett]

Do you have a portal light set just outside the window? It speeds up the incoming sunlight and the result can be a lot less noise.

[dreamspace]

By Portal light... do you mean a regular light like the rectangle or something else?

[Brett]

Use the 'plane' light, then go into its options and make it either a portal or simple portal light. You may also want to ensure that it is 'invisible'.

[dreamspace]

portal

I'm not sure if I can see a difference with or without the "portal" option clicked. What exactly does "portal" mean and what is it's particular function? Thanks so much for your help. It is greatly appreciated!!!!

[Brett]

I'm not 100% sure as I'm still pretty new at this too, but I think it's essentially a way of telling the renderer to focus its attention on the light coming from the portal object - and less so where there aren't openings.

Less math to do for places it doesn't count - that back wall that isn't even in the frame but has sun hitting it anyway for example - and more attention to calculating light as it enters portals (or "areas that are important to be receiving that light"). The result is a quicker render for the interior because the light comes in the door/window/whatever 'faster' and therefore more light bounces around the room to light it.

If someone else knows more specifically, I'd like to know more.

Brett.

[dreamspace]

Thanks Brett. It's very confusing. I think I'm going to have to photoshop the results I want for now until I (we) can figure it out.

[Brett]

I found this chaosgroup/vray video to be pretty helpful.You can see the difference when the portal is turned on and off.

https://www.youtube.com/watch?v=HMb3...ature=youtu.be

[dreamspace]

BRILLIANT! Thank you sooooo much. FINALLY, a You Tube video where I can actually SEE what's going on. This is incredibly helpful. I think it will work. You're my hero.