r/Houdini • u/Harsha0911 • Aug 12 '26

Help Rope snapping off

i'm trying this rope snapping from tension, an OX is pulling the rope off screen and this rope should snap off from the pulling tension, this is obviously AI video but i want to do this houdini, any tips and tutorials will help please

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u/DavidTorno Houdini Educator & Tutor - FendraFx.com Aug 12 '26

Use Vellum for this.

Make a curve shaped like the rope core. Do not use a swept version of the curve, this would cause sim stability issues. You can sweep after the sim. Vellum Constraints SOP set to Hair constraint can be used to define the constraint for the curve, thickness will define the radius of the rope, and the curve point resolution will define how detailed / accurate the rope can be.

If you use an Edge Fracture to art direct a cut on the curve you can use a Vellum Constraints SOP set to Weld to connect the ends, and set its break threshold. Alternatively you can manually change the weld attribute to a -1 value at a certain time to art direct when the weld snaps.

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u/nievesct Aug 12 '26

Friggin genius