P.S.: I checked the ticket number; as S. mentioned, the ticket was closed while forwarded to the development team. As stated, closing doesn't mean solving.

More was not possible for the tech support to do.

If you like to push it, use the Share Your Idea.
https://www.maxon.net/en/support-center

All the best

Hi assignment-brave,

I can offer only a workaround, but please feel free to ask tech support about earlier tickets.
https://www.maxon.net/en/support-center

CV4_2025_drs_25_RSfe_21.c4d

• Set up the Feather as needed but with a straight Spline, and adjust the thickness of the hair material.
.
• Create a copy, and while that copy is active, press the c key
.
• In the new Hair Object, set the Generate to Circle or Square.
.
• With the hair Object active, press the C Key.
.
• Place a material to the Hair polygon object (delete the origial one.
.
• Set the Material to flat and in texture Mode, align the "frame" to the object, typically that needs a 90º rotation, and in the Object Manager> Tags> Fit to Object (Alert shows up: Include all…)
.
• With that object active, object manager>Tags> Generate UVW coordinates.
.
• This provides you now with a stable UV information/setup
.
• To animate the Feather, a Spline Wrap is used, keep length is a good fit. I avoid using the full spline, as the endpoints are not well defined (Start/From)
.
• Use a Spline as the main and another (in distance) as the Rail.
.
I hope all other information is in the file; add your texture to it.

If UV is not wanted, with enough points in the Polygon results a Vertex map worked with the Spline Wrap.

As a side note, the TriPlanar is a good idea in a few cases; anything animated might not; it is, at best, a case-by-case decision.

Files: For security reasons, only Dropbox, Google, Wetransfer, Adobe, or Apple cloud services are accepted, all during uploaded with no compression and the link (as you did) pasted clearly, thanks for not shortening the URL. Sorry for the extra work. (I do not experiment with other cloud services to receive data here; we keep those out of the forum for security reasons, even if others have no concerns).

Have a great weekend.

Here is a workaround:

CV4_2025_drs_25_RSfe_01.c4d

I ahve shared a different setup here
https://cineversity.forums.maxon.net/post/7134

Hi RemoGambacciani,

Please have a look here:
CV4_2025_drs_25_SNrs_01.c4d

This is a simple but hopefully fast setup for a large number of Splines-Segments, while the color can transition from the start of the Spline to the end.

Perhaps explore this series
https://cineversity.maxon.net/en/series/cinema-4d-scene-nodes?tutorial=10-cinema-4d-scene-nodes-10-nodes-spline-generating-splines

All the best

View Tutorial
Tag: Cinema 4D | R25+

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Hi wash-conference,

Thank you very much for the feedback. This is a valuable information. Would be nice to share that with tech support. Since not everyone has the same experience, it might be a very specific combination.

That said, I have compiled a four-page list of ten options for why that could happen. Since I'm not happy with second-hand information (meaning my assumptions here), I have sent this text to the Team Manager of Support to check it - if I have included some nonsense. When I get this PDF back, I will update it accordingly and share what was seen as valid. (I expect it back next week).

I hope that will work and help me get to the bottom of this annoyance faster.

My best wishes

Hi wash-conference,

There is a longer list of options for why this can show up.

The fix in one case might not be the solution for another.

Please check this with tech support
https://www.maxon.net/en/support-center

All the best

Thank you very much, RemoGambacciani.

I will keep this theme in mind, given that it might be related to previous questions.

Cheers

Hi RemoGambacciani,

Sorry, this combination is tricky if not impossible for production level results.

In Standard Render the Hair> Render Tag can interpolate from spline segments. Is that fast? I'm not convinced that this would be the key feature. Also, this is not available in Redshift.

The file below is a starting point for further explorations IT-IS-NOT at all a suggestion nor to create any hope that this is a production ready way.

CV4_2025_drs_25_SThr_01.c4d

The way to get Spline Segments is to Convert them to a Hair object.

However, to be able to deform those, they need to be switched to Generate polygons or even instances, while the initial Guides will not be deformed.

Sorry, but the Hair object is not a simple cloner - if at all. I wrote all of that down, to show that I explored it, and used the majority of the morning for it. As I do not answer from memory, since things might change. Splines and deforers are a tricky thing, as they don't get really deformed, lines are produced and they get deformed, so far I was told.

All the best