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Vellum 101 – Grain Infection (Patreon)

Published:
2021-02-04 08:16:04
Imported:
2026-06
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Videos

Downloads

  • Vellum101_pt30_Grain_Growth.zip
  • Vellum101_pt30_Grain_Growth.zip

Missing 1 full-res photo, 2 files, as this post has not yet been imported.

Content

You ask for it, Mo tries to cook up something. This time we received a few questions on how to achieve this effect done by Matt Taylor. And while we’ve seen a few other (quite involved) techniques relying on POPs, in our opinion this can be neatly done in Vellum using grains.

Files

Previews only

Vellum_030_growing_grains

Comments

Chris Cousins

This is a great and I didn't know about this use of the pyrosourcespread as a prebuilt infection solver, that's a really nice cheeky one! Checking for the nearest mesh point on each (sub)frame seems a bit inefficient, I wonder what would happen if the nearest point was defined at birth, would the setup get a significant speedup? I might have to try this and see...

Chris Cousins
>>53175142

Ah well - answered my own question ;-) I added a rest position for each grain and used that instead of working out minpos, and it made little/no difference to the simulation time (102 frames in 2mins, vs 99 frames for your original setup). Guess the collisions etc take much more time to compute. Thanks again!

L i v i a n

after the last code in the pop-wrangle my particle start to fly everywhere

Carl Herner
>>67565557

i had this issue as well - turned out I just missed using capital P instead of p. Check all your vex code and make sure it is exactly the same as entagmas!

Pao

Hi, amazing tutorial. When I add material to the Grain, it doesn't show up in the render. I'm using Redshift

Pao

I fix the render problem but I changed the box to a sphere, nothing happens, the pyrospread is empty, it's so weird.

Nebojsa Visnjic

@Pao, All you need to do (if you're changing from Box to Sphere or any other object) is to position properly your group onto the geo. (by changing its center). Neb