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  1. Increase the number of pipe polygons to make the deformation smooth.
  2. Add the Cust modifier for the pipe (the pipe and curve must have transformations applied): set the factor and radius parameters to the size of your empty sphere, and adjust the size parameter as desired; enable the "size from radius" and "use transform" options.
  3. Add the empty constrain "follow path," specify your curve as the target, and click on the "animate path" button.
  4. If the empty is not moving in the direction you want, or if you just want to manually create an animation, select the "fixed position" option in the "follow path" constrain and animate the factor parameter. Sorry, I forgot to mention that all objects must have the same origin position.
  1. Increase the number of pipe polygons to make the deformation smooth.
  2. Add the Cust modifier for the pipe (the pipe and curve must have transformations applied): set the factor and radius parameters to the size of your empty sphere, and adjust the size parameter as desired; enable the "size from radius" and "use transform" options.
  3. Add the empty constrain "follow path," specify your curve as the target, and click on the "animate path" button.
  4. If the empty is not moving in the direction you want, or if you just want to manually create an animation, select the "fixed position" option in the "follow path" constrain and animate the factor parameter.
  1. Increase the number of pipe polygons to make the deformation smooth.
  2. Add the Cust modifier for the pipe (the pipe and curve must have transformations applied): set the factor and radius parameters to the size of your empty sphere, and adjust the size parameter as desired; enable the "size from radius" and "use transform" options.
  3. Add the empty constrain "follow path," specify your curve as the target, and click on the "animate path" button.
  4. If the empty is not moving in the direction you want, or if you just want to manually create an animation, select the "fixed position" option in the "follow path" constrain and animate the factor parameter. Sorry, I forgot to mention that all objects must have the same origin position.

  1. Increase the number of pipe polygons to make the deformation smooth.
  2. Add the Cust modifier for the pipe (the pipe and curve must have transformations applied): set the factor and radius parameters to the size of your empty sphere, and adjust the size parameter as desired; enable the "size from radius" and "use transform" options.
  3. Add the empty constrain "follow path," specify your curve as the target, and click on the "animate path" button.
  4. If the empty is not moving in the direction you want, or if you just want to manually create an animation, select the "fixed position" option in the "follow path" constrain and animate the factor parameter.