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I am trying to animate a logo in the shape of a circle. The idea was to have it floating in the air and have some wind going through it.

What I have done so far:

  • I have used cloth simulation and the wind force field, which all works easily with a rectangular plane, but not so well with a circle.
  • I have also tried to subdivide the circle by hand, I have set gravity to a negative value and also used a Vertex Group (one vertex on the left) as a Pin Group but this all yields more comical results.

What I need help with:

  • How do I create the proper plane for the circular logo? It doesn't seem to work as well as the rectangular shape with subdivisions. I have already tried to cut out a circle from a subdivided plane with a boolean function but that has failed.
  • How can I achieve the circular shape to stay in place without pinning it to a spot or having it float away in negative gravity?

Images Unfortunately I can't find a perfect example so you'll have to bear with the screenshots of my recent tries:

This the force field and the circle shape (pinned with one vertex on the left and negative gravity) Scene Setup

This is just an example of what it should look like on the front. Front View

Edit: I have tried knife project on the plane like suggested in the comments. Have to remove the outer edges afterwards.

Knife Project Circle on Subdivided Plane

Edit 2: It seems to work now, although I am still having trouble to get the edges really smooth and the plane itself to be absolutely smooth in the renderer. Still, thanks a lot for your input so far!

enter image description here

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  • $\begingroup$ if your current topology (concentrical circles) doesn't work you could create a circle and cut a perpendicular grid with the Knife Project tool $\endgroup$
    – moonboots
    Commented Jan 21, 2021 at 15:29
  • $\begingroup$ thanks; i will try that! $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 15:32
  • $\begingroup$ is it supposed to move like a flag? You can rotate the force field object on the Z axis so that it changes the wind direction and give better result; also vary its strength $\endgroup$
    – moonboots
    Commented Jan 21, 2021 at 15:40
  • $\begingroup$ yes, it should stay in place and wave a little like a flag. the problem is that i have to select a "pin" which makes the movement look weird. It should simple float in the air and have a little flag-like movement throug the force field. $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 15:43
  • $\begingroup$ I have tried the knife project idea, (see edited post) but it didnt work regarding the edges. EDIT: MY BAD, Have to remove the outer shapes. $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 15:50

1 Answer 1

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So as I said you can cut a grid with the Knife Project tool. Then to make it work properly, first create the pin group:

enter image description here

Choose Cloth > Cotton for example. Create a Force Field > Wind and a Force Field > Turbulence. Make the Wind rotate and vary its Strength value through time. Maybe also create a simple edge and give the circle object a Copy Scale constraint with the edge as Target, and change the height of the edge a bit so that the circle vary its height a bit as well, it will create more folds:

enter image description here

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  • $\begingroup$ That actually helps a lot to understand your input better, thank you! I'll try to follow your steps. $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 16:40
  • $\begingroup$ Are you using a subdivision modifier to get the circle surface smooth? $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 16:43
  • $\begingroup$ Yes Subdivision Surface modifier + Shade Smooth $\endgroup$
    – moonboots
    Commented Jan 21, 2021 at 16:47
  • $\begingroup$ Thanks a lot for your quick and perfect help :) $\endgroup$
    – jafi
    Commented Jan 21, 2021 at 16:54
  • $\begingroup$ I have a follow-up question: I was successful in creating the circle shape as well as the wind/turbulence setup like you described and showed in your post. However, I did not quite understand what you meant with "create a simple edge" while trying to implement your Copy Scale technique. Could you explain it a bit more? Thanks in advance if you have the time :) $\endgroup$
    – jafi
    Commented Jan 22, 2021 at 21:42

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