OTOY Forums

Hello all ,

I'm working in a scene right now that is getting white specs (fireflies) in the render. I dug around in the forums and found that messing with the caustic blur and gi clamp settings would possibly cure my problem... But the actual problem is that I'm using directlighting to light my scene and i'm not seeing the two attributes available in the settings menu? is there a work around for this? I tried switching to pathtracing but it seems to light my scene completely different from directlighting.

I'm using Octane 3.1 viewable versions
on: OS X 10.10.5
Processor: 2 x 3.06 GHz 6-Core Intel Xeon
Graphics card: NVIDIA GeForce GTX TITAN X 12288 MB
Memory: 64 GB 1066 MHz DDR3

Please help!
Thanks!

Hi,
yes correct, those values are available only with Path Tracing and gives you much faster and better results than DL Diffuse, in my opinion.
If you try to strongly reduce the GI Clamp value, you will see that also the general illumination will be darkened, giving you a result quite similar to the DL Diffuse kernel, but with faster render time.
With lower GI Clamp values, you can leave the Coustic blur at 0, gaining a bit of more power from your GPUs
In v3 you can also augment the Parallel sampling value to speed up the rendering untill your VRAM is not full.
ciao beppe

Theres an additional way to approach this if you're using Directlighting..
Add a camera tag to you camera.. click "enable camera imager" under Camera imager.
then bring your 'hot pixel removal' down.. this should help remove some fire flies and hot points..
hope that helps.
R

Raoul wrote:Theres an additional way to approach this if you're using Directlighting..
Add a camera tag to you camera.. click "enable camera imager" under Camera imager.
then bring your 'hot pixel removal' down.. this should help remove some fire flies and hot points..
hope that helps.
R

This also works for PT.

Hi Raoul,
you can activate the hot pixel removal also in the live view in the imager tab, but unfortunately, it's better to not use values under 0.65, otherwise you can lose some details and add blur to the image, so use it carefully
In my opinion, Path Tracing with GI Clamp is far better and it's really difficult to see fireflies with it, give it a try
ciao beppe

Will do Beppe! Cheers for the tip. I'll have to do some speed tests and see how they compare.