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I am trying to get this fake smoke effect using wave modifier but it doesn't work properly. Here is what I'm trying to do enter image description here

I tried with wave modifier but it looks like this

enter image description here

It will be better if someone explain me this

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2 Answers 2

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Pretty close to what you want, just rotate the origin a bit on Y to make it more similar to your effect:

enter image description here

First thing create a shape like that:

enter image description here

Weight paint the bottom so that it won’t move:

enter image description here

Choose a motion on X only (or Y, depending on your object orientation), enable Along Normals if you don’t want the effect to only happen on Z, Height is the height of the wave (how tall they are between bottom and top), Width is how big they are, Narrowness is how round or sharp they are, choose the vertex group, put a negative Offset if you want the waves to begin before frame 1, increase or decrease the Speed depending on how fast you want the waves to go:

enter image description here

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  • $\begingroup$ Very elegant! Nice! +1 $\endgroup$
    – LaserLars
    Mar 10, 2023 at 14:32
  • $\begingroup$ thanks, you had a good idea too $\endgroup$
    – moonboots
    Mar 10, 2023 at 14:33
  • $\begingroup$ It solved my problem , Thank you very much :) $\endgroup$ Mar 15, 2023 at 12:44
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The effect that you are trying to achieve is more complex than one might think at first glance. Your result with the Wave Modifier is already quite good! Unfortunately, it is very limited when it comes to customizing the dynamic shapes of the wave.

You could try a Curve Modifier instead: enter image description here Your smoke cloud will be deformed along a pre-defined (or even animated dynamic) path. I only did a very rough test with a Nurbs Sphere and a Nurbs Path, and it definitely needs a lot of tweaking, but it might be a way for you to get better control over the shape of the cloud.

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