Help me in this rendering!

[john_petrucci]

Help me..
This is my rendering after 20.000 samples (pathtracing depth 12), i have the sunlight in the windows and door(out of visual in the right corner) the sunlight is set power 11.0 and in the window i have glass opacity 0 and the emitter surface(light ambient) with power 0.5 and 6500k°..
The walls is diffuse material..
The image after 20.000 sample is very very dirty, can you help me to setting the best image???

Thank You!

Paolo

[mlody47]

remove the glass... and check.

render twice the resolution and downscale it to this one.

Power 11?? Maybe set it to 1 ,and play with exposure / gamma more.

Maybe use firefly removal.

or... ...I dont know.

[Proupin]

For now avoid direct lighting as it produces too many caustics, translating into fireflies you call dirt... you'll get a cleaner image with an environment hdri...

there is a "pixel removal" slider that does a pretty good job at removing those fireflies if direct lighting is a must... and it's good at removing detail as well (mlody bastardo you posted first)

Also, do not abuse the roughness on glossy materials

About the model, try to open the walls behind you so more indirect light can leak inside... sort of like a tv set

And downscaling is awesome too. you can do two or three renders and blend them in PS, it will pretty much remove all the fireflies as well...

This will be no issue as soon as MLT-or similar hits Octane

[kubo]

lol, you are getting the best advice around, so just a small point, there is no sense on using a glass and then setting the opacity to 0, either you have glass and use the opacity (just lower than 1, but not 0) trick to have some light in, which even thou it works it takes some time to solve, or you leave it out, since in this type of scene with so much light out there won't be any reflections on the glass. But 0 opacity is like it wasn't there, it won't add to reflections, and even thou I'm sure Radiance or Abstrax would give a better insight, it's most likely having a toll on render time.

[john_petrucci]

Thank You at all!

I will try to remove window glass and to set power sunlight 1 and setting different exposure and
gamma...
For Glossy materials i will try to setting the roughness 0.001(default value) or high value.

I will update the image very soon!


Paolo