Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Feature Requests => [Max] Resolved Feature Requests => Topic started by: marunioms on 2012-10-21, 17:31:36

Title: Reduce noise.
Post by: marunioms on 2012-10-21, 17:31:36

How can I reduce noise in my interior? I tried change "adaptive steps" to 8, but render is very slow. I use Path tracing + HD cache (sorry for my english).

Title: Re: Reduce noise.
Post by: maru on 2012-10-21, 17:43:10

It probably depends on your lighting setup. I think some viewport screenshots would help.

Also, passes:0? Maybe you're using bad image sampling?

Title: Re: Reduce noise.
Post by: marunioms on 2012-10-21, 17:52:08

I use corona sky + daylight system (corona sun)

Title: Re: Reduce noise.
Post by: maru on 2012-10-21, 17:56:36

Change "renderer" to progressive

or

in "Renderer: Bucket" tab change adaptive threshold to something lower.

Title: Re: Reduce noise.
Post by: Ondra on 2012-10-21, 18:06:15

You have very low number of rays per second, according to the renderstamp. Either the scene has lots of fakes in it, or its because of the old CPU (new i7s are probably 6-10 times faster)

Title: Re: Reduce noise.
Post by: marunioms on 2012-10-21, 18:51:42

maru, Keymaster - thanks.

I Changed "renderer" to progressive and changed passes. Now is better. But answer is: too old CPU :).

Title: Re: Reduce noise.
Post by: Ludvik Koutny on 2012-10-21, 19:10:50

In general, you should always use Progressive renderer for best speed/quality ratio ;)

Title: Re: Reduce noise.
Post by: Sam75 on 2012-10-24, 22:00:51

Do you really need sun ?

If not turn off sun and Sky, replace them with a rectangular coronalight on your behind your windows.

Until we get skylight portals it works fine for me.

Title: Re: Reduce noise.
Post by: maru on 2012-10-24, 22:25:40

Sky portals.... here we go again! :)

Title: Re: Reduce noise.
Post by: Sam75 on 2012-10-24, 23:07:57

Quote from: maru on 2012-10-24, 22:25:40

Sky portals.... here we go again! :)

what do you mean ?

Title: Re: Reduce noise.
Post by: Ludvik Koutny on 2012-10-25, 09:34:39

Its funny how people expect sky portals to make much of a difference. Especially when you can't even see how big window openings are in this scene ;)

Title: Re: Reduce noise.
Post by: Chakib on 2012-10-25, 14:37:43

I have also a Q6600 and for a room you should be thankful that you have already that quality in 17min with such old processor, also it seems that the scene doesn not have enough light source,

Gives some hours and it should be good, be patient !

Title: Re: Reduce noise.
Post by: Sam75 on 2012-10-26, 05:06:19

Quote from: Rawalanche on 2012-10-25, 09:34:39

Its funny how people expect sky portals to make much of a difference. Especially when you can't even see how big window openings are in this scene ;)

Convinced or not yet ?

Title: Re: Reduce noise.
Post by: Ludvik Koutny on 2012-10-26, 06:48:59

Quote from: Sam75 on 2012-10-26, 05:06:19

Quote from: Rawalanche on 2012-10-25, 09:34:39

Its funny how people expect sky portals to make much of a difference. Especially when you can't even see how big window openings are in this scene ;)

Convinced or not yet ?

Have you tried increasing light sampling multiplier in the other case to something like 10? and PT samples as well? It's more of a sampling distribution issue than performance issue ;)

That being said, i am quite sure in case of the room marunioms posted, window opening will be a lot large.

You have to look at from a bigger view. Portals introduce a big seam into lighting workflow, and separation from exterior and interior space in complex scenes is what we would like to avoid.