The manual says that I could animate this parameter but it is not working for me the constraint length doesn't chage over time, am I missing something?
Thanks.

You can't animate the input to the vellumsolver, as this is only read for the first frame.

Instead, for the SOP-based Vellum Solver dive inside it and add a Vellum Constraints Property. This lets you modify Rest Length scale there. You may want to create constraint groups to ensure it modifies the ones you want.

For DOP-based vellum solver, it is a similar idea, wire in a vellum constraints property like you would any microsolver.

Hello jlait & mzigaib, I'm trying to do something similar with the stiffness parameter but I'm not having much luck. Attached is a project file, would you take a look and tell me what I'm doing wrong?

Thanks!

Hey Peter,

Use the Vellum Constraints node to set up your constraint, but use Vellum Constraints Property to animate your values.

Thanks Tanto,

This is exactly what I was looking for. I didn't realize it was a separate node, I should have looked a little closer

Hi,
How to animate vellum rest length scale in case if we have more cloths related to same vellum solver because we want this cloths to interact with each other? So how to animate in this case independently for each vellum cloth separate vellum constraints property?
We can animate with separate vellum solvers but then we losing the interaction (or not?).
Thanks

@ervin3d: It works in a single solver, but you have to create a different constraint group for each constraint you want to animate separately, then specify these groups in the constraint property nodes.

WagnerFX
Hi Guys,
is it possible to drive the restscale with a noise in PopVop?
Different restscale on every point.

It's a bit late now, but I this is fairly similar to what you're looking for:

https://www.youtube.com/watch?v=55dYtAsSh-w [www.youtube.com]

Hello ! I am very new to Houdini and I am looking to assign different Rest length values on a cloth, similar to this example https://vimeo.com/369271677. [vimeo.com] However, so far my cloth gets distorted and triangulated. Could you please point me to the right direction ? ( i can also add my failed attempt if that helps) . Your help is much appreciated!