This image shows the problem:
I’ve tried changing default spline Up Vector, but it didn’t helped. In this example we can clearly see that the spline twists only when it’s facing near X or -X direction. Is there any workaround for this?
Hey Slavq,
If this is a custom spline mesh, you can create a way to un-twist the spline in the opposite directions based on each point.
I would also take a look at this post to see if you can find any help suggestions or solutions as well.
Let me know if you have further questions or need additional assistance.
Thanks,
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Thanks. In my case it’s procedural and generates in many different directions, depending on random seed.
The solution from the post that You have mentioned didn’t helped, but something very similar did: Instead of taking spline direction + rotating, I took spline Up Vector (‘Get Up Vector at Time’) and set it as Set Spline Up Dir when adding spline mesh component.
This fixed the twisting, but created a problem when spline is going up or down :
It’s like the roll is off, but I’ve tried to set roll manually to the spline roll at the time (or at 0), but nothing changed. It’s strange that is happens only if spline is going up or down…
Update: Another screenshot showing the problem:
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It seems like you might now need to use the blend angle corrected normals for the rope material so your normals blend at the seams where they would connect.
Keep messing around with your blueprint and materials, as well as locating some other helpful solutions to see if you can get this worked out. You are on the right track and seem to have a good handle on the troubleshooting process. If you get completely stuck, let me know and I can assist you further.
Cheers,
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I know this is an old post but my plugin is specifically designed to address this issue.
It offsets a second spline so that even when the spline is subdivided you won’t get any twisting.
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The solution is actually really simple. You just need to “Set Spline Up Dir” from your “Add Spline Mesh Component’s” return value, set the default to X:0, Y:0, Z:1 and then promote this to a variable and expose it. Then when you run into an issue, just set the Up Dir to be a different value based on the rotation of the spline mesh. For example, if you rotate the spline so it’s going up in World Z, then you’ll need to set the Up Dir to X:0, Y:1 Z:0. This does limit you in that you can’t have one constant contiguous spline mesh that moves in every direction. For that, you would need to either fix the code yourself or purchase @RyanGadz 's plugin.
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I found an even better Solution by Chris Murphy:
https://twitter.com/HighlySpammable/status/1245994732615942147
Copy and Paste the Construction Script code into whatever Engine Version you’re using:
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Hi, I’ve check the code and try to implement it in c++, unfortunately the “SetSplineMeshRelativeRoll” function doesn’t exist. Do you know by any chance what’s inside?
I’ve applied Chris’s code and it appears to make no difference? Also tried this code (found on Reddit) and also no impact at all… Not sure what I’m missing here?
Chris’s code uses a “SetSplineMeshRelativeRoll” function, did you find what is inside?
Yes, just grab the uasset from his twitter link and you can see what he does.
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He has more than 11 000 posts on twitter lol.
Thanks anyway 
Lol, I thought you saw it above.
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My bad, I didn’t read carefully and thought it was the link of the blueprintUE page 
thank you !
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yeah the blueprintUE page is a red herring without that function.