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Vellum 101 - Locomotion Using Fiber Constraints (Patreon)

Published:
2019-04-18 08:01:00
Imported:
2026-06
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Videos

Downloads

  • Vellum_fibre_walker_01.hip
  • Vellum_fibre_walker_01_H18.hiplc
  • Vellum_fibre_walker_01.hip
  • Vellum_fibre_walker_01_H18.hiplc

Missing 1 full-res photo, 4 files, as this post has not yet been imported.

Content

Ah! The classic FEM setup: Weirdly moving, crawling softbody creatures that make you shiver in slight disgust. Good news: It can be done in Vellum too! Same level of disgust but faster simulation times. Fibre constraint galore!

In this tutorial we'll build an organically moving worm like creature using H17.5's new Vellum fiber constraint.

EDIT: Updated the scene file to work in H18 too. Solidconform doesn't properly promote attributes in H18.348, so it needs to go in before setting up our friction and mass.

Files

Previews only

Grains & Vellum 101 pt. 17: Awkward Locomotion Using Vellum's Fiber Constraint

Comments

Chris Johnstone

... hi - is this possible not using VEX? - It would be most helpful to see how if it was ... cheers - C

entagma
>>21880839

Hi Chris, yes it absolutely is - just use VOPs instead of VEX to drive the constraint & point attributes. VEX just is a bit more compact. You can do it! All the functions are there - just use the POPVOP instead of the POP Wrangle and the Geometry VOP instead of the Geo Wrangle. Cheers, Mo

entagma
>>21880868

Hey Dzmitry, haha - love it! From the movement it looks like your worm thingy is trying harder than the slacker I implemented! :) Cheers, Mo

Konsta Ryösä

Thanks for the great tutorial! I tried to make it more disturbing: <a href="https://vimeo.com/331396692" rel="nofollow noopener" target="_blank">https://vimeo.com/331396692</a> Btw - how could I add some sort of a slime trail to the moving objects? Would be neat to make some of greasy slug things. Cheers!

jeremy jozwik

shift click first vellum connections and single click the next node down, BAM all three connect! :D also, i was trying to convince <a href="https://twitter.com/3Dmattias" rel="nofollow noopener" target="_blank">https://twitter.com/3Dmattias</a> to do vellum when he was messing about with his FEM tentacle fight animations, i think i can sway him now. :D

Flavio M

Hi Mo, I was wondering if you have any tips on how to properly UV a vellum hair simulation, after you added it to a polywire for example.

entagma
>>23859477

Hi Flavio, by "Proper UV" you mean UVs along the polywire? Or the whole individual strand having one single UV value? Cheers, Mo

ata mutahar

Hi Mo, in Houdini 18 this is not working at all even if i import the same project file not working only in 17.5 so if you can update it will be great. thank you

Marvelous Media Engine

Hi there. I notice in Houdini 18.5, Vellum Configure Tetrahedral Softbody brings in different nodes, like tetrahedral stretch. It gives very different results at first, but by the end it looks quite good. What's the difference between this new node and tetrahedral volume? In other words, does it offer any advantages? Thank you!

Ray J

Hi Mo! How is it possible to keyframe the friction in order to control when the object moves forward and when it doesn't? (minute 9) Thanks