Ok, sry for that late reply, I had a lot to do.
This is not for an animation, so I don't need to use this kind of filter, but it's good to know what could be done with it. So at least a got rid of those ff, by using a HDR image instead of the procedural sun and sky.
So no handbrushing or masking ...

Thanks everyone for the answers. I followed your advices and switched the kernel, lowered pixel removal and tried some more things and this is the result now.
untitled2.jpg

Much better but you can still see some fireflys... I cant get rid of those.
Here my new settings:
kernset.JPG

camset.JPG ...

Edit: the more samples, the more fireflys I get

No one can help?

Hey there,

no matter what I try with the kernel settings I always get the same firefly problem in the image:
untitled.jpg
Kernel:
settings.JPG
Glass material:
material.JPG

Blender Octane ver 2.71.5 with Octane 1.55
Win 7 64 | 16 GB | GTX 680 | AMD x6

How can I solve those fireflys?

best ...

+1

+1