Firefly question. Tweet

[Garquitectos]

First I'm amazed with Octane!!! I have some skill with Artlantis and with Maxwell. With Artlantis I never get the quality that I want, and with Maxwell the quality is superb but its painfully slow... Now with Octane I have all the things...
Well the question: I'm rendering a interior scene with pathracing kernel (16) and when it reach about 2000 samples it has very few fireflys but when it reach about 4000 appears new fireflys
How can I control this firefley? I have pixelremoval in 0. More samples?
Thanks in advance.

[face_off]

Hi Jose

I think some things look like fireflys but may not be. Sometimes a glossy material can have a too high specular value and too low roughness and this appears to be a firefly, but is in fact just a very bright reflection (the couch?).

Also, if the light you are illuminating the room with has come through glass, that takes longer to render, and PMC will sometimes be much better than DL in this case (although probably a lot slower). You can reduce the opacity of the glass (so more unfiltered light gets through) too.

On a scene like that which you have posted, all the light in the scene is from outside, so it would be worth trying to lower "directlight_importance" in the "kernel" setting to see if that helps (EDIT: only if using PT or PMC).

Also, for "pathtracing", you are using a depth of 16? That seems high. The lower you go, the more depth you get in the scene and the faster it renders. You can increase gamma to compensate if needed. I tend to go with a depth of about 6.

Paul

[kavorka]

If those are from the light passing through the glass, then turn up your caustics blur setting in the kernel options. Also, change to PMC and you might be surprised to find them all gone.

[Garquitectos]

If those are from the light passing through the glass, then turn up your caustics blur setting in the kernel options. Also, change to PMC and you might be surprised to find them all gone.

Thanks, I'll try