Cloud shader stutters in animation

Question Animation

I am currently working on a small animation: Here a cloud flies relaxed over the screen and a penis hangs relaxed out of the cloud.


Seen as a still, I'm satisfied with everything, but in the animation the cloud is jerky and the shading in particular causes problems. There are hard and erratic jumps in hue. This really looks like an error.

It's best, of course, you look at this...



I animated the size of the texture for the volume-dissplacement so the cloud changes a bit in the movie. The value oscillates between 4 and 5. I think this aspect could have an unfavorable effect on the shading.


Using the path below, I cut the cloud in half by applying a gradient to the origin of the cloud.

Over the nodes of the cloud material, I split the cloud down the middle to get a flat bottom for the cloud. Using the lower nodes, I cut the cloud in half by applying a gradient to the origin of the cloud. (see image)
Via the upper nodes, I take back the clarity of the halving.


If you want, you can of course take a look at my file:

Blender File



I would be very happy if you could help me figure out how to create a nice smooth animation now.


Many Thanks! Max



  • Maximilian Erl(Max-Erl) replied

  • spikeyxxx replied

    I'm not an Eevee expert and these kind of questions are really hard to troubleshoot (being a long animation), but I tested a small part (Frame 740-790) and rendered it as PNG's and as FFMPEG and the latter seems to be without any stuttering, where as the PNG's do have some shadow shifts between Frames. Can you try Rendering as FFMPEG (normally not recommended, but this is Eevee...) and see if that helps?

    As a (maybe irrelevant) side note, this scene crashes Blender on my computer with version 3.2 and 3.3, when I try to Render (even a single Frame).

  • Maximilian Erl(Max-Erl) replied

    Thanks for the tip. But that would have been too good to be true. I have now also rendered a section as FFmpeg, unfortunately the belly of the cloud is still trembling the same way. Too bad, but thank you!


  • spikeyxxx replied

    Try not animating the Sizes of the Textures in the Volume Displacement...

  • Maximilian Erl(Max-Erl) replied

    Yes. That´s definitely a workaround. But then how would you animate the clouds?

  • spikeyxxx replied

    What you can try, is setting the Texture Mapping in the Volume Displace Modifiers to Global.

    That might give a smoother transition and prevent that flickering.