Fireflies

[gmaisg]

Hi. I am a Lightwave user and an archviz artist. I have been using the Octane Lightwave plugin for a while now, I think since it started. Most of projects that I use the plugin is for external shots due to the instancing feature. Internally is really hard to manage the fireflies. I hoped that with the upgrade to 2.0 they would be more manageble. But testing in an interior scene with sliding glass doors, its impossible to get rid of them, and since I have deadlines I can not have the priviledge to let it rendering for two days. I am questioning if I am missing something or doing something wrong. I really hope to use Octane in Lightwave for interiors shots. If anyone have some clues or tips, I will apreciate.

Attached is the sample image - PMC Kernel - 7 minutes (Pathtracing was even worst)

Thanks all,

Ton

[FooZe]

Hi Ton,

Usually the best option for quickest cleanest interiors is to use DL (either in AO or Diffuse mode) and make sure the exterior glass has "fake shadows" enabled.
Does that work any better for you?

Thanks
Chris.

[gmaisg]

Hi Chris. Thank you for the rapid reply. I will give a try with the options you gave.

Best regards,

Ton

[alexos]

Hullo,

you can somewhat reduce the amount of fireflies by playing with the "hot pixels visibility" parameter in the imager:camera node, but keep in mind it tends to blur small details - so it depends on your scene. Other than that, you can always use some post- method (like luma noise in Lightroom or one of the many noise-reducing plug-ins for photoshop). However, it seems to me that there shouldn't be so many hot pixels in a seemingly simple scene as that; what kind of lighting are you using?

EDIT: you're also using the thin camera with the default 1.0 DOF, which doesn't help.

ADP.

[gmaisg]

Hi alexos. Thank you for the tips. In this scene I am using sunlight, and that is true I left most of the parameters at default value. I will play more with some setings as you mentioned.

Thanks,

Ton

[gmaisg]

Hi, just posting a test render, 30 minutes more or less, with the directions of alexo. Changed some setups as aperture 0.25, 25% hot pixel visibility, etc...used pathtracing 32 depth for diffuse and glossy. Thanks for the advise.

Best regards,

Ton

[Lewis]

Much better/cleaner this time. does it clean with time or now with new settings fireflies are good/better from start?

[BorisGoreta]

In recent versions you can also reduce energy in render kernels to reduce hot pixels.