OTOY Forums

Hi all,

I work mostly on interiors (for now) and just can't stand the fireflies in the output renders. I tried using Defly and had partial success with it, but while it gets rid of the fireflies it also loses some of the detail it the final image.
Is MLT going to be a separate preview kernel (just like directlighting and pathtracing) or it refers to the ability to use glowing objects in the upcoming 2.3 version?
Will MLT be able to get rid of ALL the fireflies (or at least large portion of them)?
So far I have noticed fireflies occurring mainly when using maps under bump channel. Is there a slider in Octane which leads to reduction in the fireflies (I do not mind spending much more time for rendering if that will help).

Thanks a lot.

Hi,

I found a post-pro trick that obviously can't be used for animation, but allows to clean very well most of still images :

- In Gimp or Photoshop, or any prefered image editing software, put a copy of the image on two layers.

- Apply a denoiser or a dust removal filter on the lowest layer.

- Using the eraser set to around 4 pixels, make holes in the upper layer at the location of the fireflies. If they are not too numerous, it is not much tedious.

This will reveal the cleaned image only around fireflies, without any visible blur effect on the main surface of the image.

If it can help you while waiting for MLT !

Thanks a lot ROUBAL,

I tried your tip and it worked quite well. Although I placed the layer with removed noise on top and played around with its opacity and style. Still haven't removed all fireflies. Hope MLT will put an end to it.

Again- thank you very much, man.

the firefly with bump maps issue is due to you having a too high bump power.
it should be very low, eg millimeters, like 0.1 or lower.

Radiance

julianb wrote:Hi all,

I work mostly on interiors (for now) and just can't stand the fireflies in the output renders. I tried using Defly and had partial success with it, but while it gets rid of the fireflies it also loses some of the detail it the final image.
Is MLT going to be a separate preview kernel (just like directlighting and pathtracing) or it refers to the ability to use glowing objects in the upcoming 2.3 version?
Will MLT be able to get rid of ALL the fireflies (or at least large portion of them)?
So far I have noticed fireflies occurring mainly when using maps under bump channel. Is there a slider in Octane which leads to reduction in the fireflies (I do not mind spending much more time for rendering if that will help).

Thanks a lot.

http://www.refractivesoftware.com/forum ... 075#p25075