Reduce noise.

[marunioms]

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).

[maru]

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

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

[marunioms]

I use corona sky + daylight system (corona sun)

[maru]

Change "renderer" to progressive

or

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

[Ondra]

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)

[marunioms]

maru, Keymaster - thanks.

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

[Ludvik Koutny]

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

[Sam75]

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.

[maru]

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

[Sam75]

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

what do you mean ?

[Ludvik Koutny]

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 ;)

[Chakib]

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 !

[Sam75]

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 ?

[Ludvik Koutny]

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.