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I want to merge and bevel the tunnel's spiraled stripes into a seamless backdrop. Thus the backdrop is of made of the similar 5 stripes as the screw, though not screwed anymore.

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How can I achieve that?

The smaller trumpet(#1) serves as other depiction of my imagination to merge and bevel the spiral and seamless backdrop.

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    $\begingroup$ It is a first time I see someone starts whole cable from single vertex :) Awesome. Just a big disadvantage is you have to use very dense topo to get desired shape. I followed your system, but seems to me lighter to create base segment from faces with better top and than use modifiers ... or to add one Subdivision after first Screw...? $\endgroup$ – vklidu Mar 2 at 22:40
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From your question I'm not sure about final desired shape, but you can try Lattice modifier or Surface Deform modifier

Step 01

  • First you would need to straight ends of cable - just change your Screw.001 modifier > Screw > 0 m

enter image description here

Step 02 - version Lattice

  • Now you can add Lattice object under Lattice Properties change Resolution to 3. Position it at the end of cable. Add Lattice Modifier to cable, choose object Lattice. Select Lattice switch to edit mode and scale bottom part.

enter image description here

  • If you don't mind make cable circular increase Screw.001 > Steps Viewport/Render to 20. Also there is not a necessary to have first Screw modifier Steps 64 ... 24 seems to work as well.

enter image description here

Step 02 - version Surface Deform

if you want the cable from flat segments (as in your example) try it with Surface Deform modifier (but there is probably many other ways)

  • add Subdivision modifier to get more segments on straight end edge
  • add Cylinder, in edit mode add two Edge Loops, add Subdivision modifier too
  • add Surface Deform modifier, select Cylinder as object, than BIND
  • now if use change Cylinder shape (like scale bottom edge loops it will shape Cable end)

enter image description here

  • anyway modifiers use in order - Displace, Array, Screw, Screw.001, Latice or Surface Deform, Curve, Solidify, Bevel

enter image description here

Step 03

To let "trumpet" shrink on "backdrop" curved part ... try your luck with Vertex Weight Proximity modifier with backdrop object as Target, it will generate a vertex Group with weight that we can use for ShrinkWrap modifier .

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