Page 1 of 1

interior / PT render times

Posted: Mon Jul 29, 2013 8:07 am
by DIO
To improve my Octane skills since I´m still started to use it, I made an interior scene.
In this scene Direct Light didn´t really give me the result I wanted, so I rendered it with PT.

The picture rendered für 10 hours on 1920x1080 and still isn´t completely noise free.
I used path tracing with max depth 7 and 10.000 samples. I just let it run all evening and
night and saved the actual result in the morning (it is still running now).
Since I still don´t really have a feeling for "right" octane render times, I´m wondering, why
this scene took so long, or if it is normal on a single GTX 570.

I know I used path tracing, which takes longer, I have glossy materials and the light
from the outside is coming through glass. There is only a HDRI in the environment and invisible
octane lights as portals in front of the windows (also on the right outside the camera view and a weak one behind the camera).
What I tested on lower resolution.

-Rendering, without the glas
-Remove glossy reflections from the floor (the wall paint is only diffuse).
-Increasing the samples in the octane lights up to 8 (how important is this value for noise
reduction?).

Still I always got the same amount of noise/renderspeed. I don´t know what I could do to reduce
the render speed further. Maybe it is just normal for an noise free interior image on a gtx 570 and a second or quicker card is needed?

Re: interior / PT render times

Posted: Mon Jul 29, 2013 9:01 am
by Karba
DIO wrote:To improve my Octane skills since I´m still started to use it, I made an interior scene.
In this scene Direct Light didn´t really give me the result I wanted, so I rendered it with PT.

The picture rendered für 10 hours on 1920x1080 and still isn´t completely noise free.
I used path tracing with max depth 7 and 10.000 samples. I just let it run all evening and
night and saved the actual result in the morning (it is still running now).
Since I still don´t really have a feeling for "right" octane render times, I´m wondering, why
this scene took so long, or if it is normal on a single GTX 570.

I know I used path tracing, which takes longer, I have glossy materials and the light
from the outside is coming through glass. There is only a HDRI in the environment and invisible
octane lights as portals in front of the windows (also on the right outside the camera view and a weak one behind the camera).
What I tested on lower resolution.

-Rendering, without the glas
-Remove glossy reflections from the floor (the wall paint is only diffuse).
-Increasing the samples in the octane lights up to 8 (how important is this value for noise
reduction?).

Still I always got the same amount of noise/renderspeed. I don´t know what I could do to reduce
the render speed further. Maybe it is just normal for an noise free interior image on a gtx 570 and a second or quicker card is needed?

Try to set caustic blur to 1.0

Re: interior / PT render times

Posted: Thu Aug 01, 2013 12:08 pm
by NVN
put some arealights on the position of the glass.
It helps me by my last project.