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Robin Betts
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This GN approach expects a plain, un-bevelled curve as input:

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It lets you set the shape of the pulse, and animate the diameter of the bevel, the pulse's position, length and diameter.

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.. looking back at this, you may also want to expose the curve's resampling length, to make the group more adaptable to scale.

Robin Betts
  • 78.8k
  • 10
  • 79
  • 199