Volumetrics and Eevee render artifacts

[SidV]

I was following a tutorial by Dylan Neill about Auroras, when i discovered some strange artifacts in my renderings that i cant get rid of. This is definetely an Eevee problem since they dont appear in cycles. Have a look at that rendering below.

Moving the camera or the volumetrics didn’t help, the artifacts stay at the same place no matter what angle. Please help.

[Hunkadoodle]

A few things really quick.

• Is this the tutorial: https://www.youtube.com/watch?v=uvsSuZ7I0BY ?
• The artifacts’ location makes me think that it is related to some screen space effect - if you change your overscan setting, does it go away? (Manual page for Overscan: https://docs.blender.org/manual/en/latest/render/eevee/render_settings/film.html#overscan )
• As it looks like this is a volumetric effect, have you tried lowering your tile size, increasing volumetric sample count, or adjusting your sampling distribution in the Volumetrics panel of your Render Properties:
  
  
• Is there a moment while you were working on this tutorial where this artifact wasn’t there and then it started showing? Did that correlate to a certain time code of the video?
• You’ve tried rendering with Cycles, moving the volume, and moving the camera. Is there anything else you’ve tried?

Scrubbing through the video and seeing how complex this node tree is, it looks like there could be any number of things causing the artifacts somewhere within your node tree. Cycles and Eevee evaluate and render certain nodes and volumes differently, so just because it looks different in Eevee may not mean that Eevee is the “problem.”

If any of those fixes worked, please let us know. If not, maybe you can share your file for others to work on to look for a fix. Let us know!

[SidV]

Hello Hunkadoodle,

Thats an awesome answer. Your tip to increase the samples, solved my problem right away.

Many Thanks!

[Hunkadoodle]

Glad I could help you find a solution!