Red Line Artifacts using Point Light

Krakatoa for Maya
1

Hello,

I’m experiencing artifacts of red lines within the particles when rendering in Krakatoa, only if i use a point light within the particles.
I’m using emission and absorb.

I’ve found i can rid of the red lines when i turn on light pass density, however i then begin to see gaps within the particles where it almost looks like artifacts of rays within. I couldn’t find the balance between the 2 values to make it look the way it does with this render, but with no red lines.

Any assistance to get rid of the redlines would be appreciated.

thanks :slight_smile:
-Dan

krakatoa_Lines.jpg
krakatoa_Lines.jpg1263×705 460 KB

2

Hi Dan,

Could you upload the EXR output of this so we can check the actual real unclamped pixel values?
There might be some bad math going on there, but I haven’t seen this before.
If you could share the actual scene setup/particle data so we could re-render it ourselves, it would be even more helpful!

3

The particle data was pretty large, I wouldn’t be able to upload that anywhere. (gb’s)

I’ve deleted the partitions by now, but I’ll re-partition to a similar amount and output an EXR for you.

I did notice, if i tested without partitions, it rendered without the red lines. I’l try again. :slight_smile: