Houdini Tutorial: Advanced Velocity Fields I - Simulation Setup

Links:

00:00 Intro
00:12 Import 3D Scan
01:21 Source Volumes & VDB Potential Flow Explained
03:40 VDB Potential Flow Settings
04:05 Disclaimer on Custom Velocity Fields
04:36 Visualize Flowvel Field
05:24 Double Cross Product
07:24 Add Noise to Velocities
07:46 Particle Sim Setup
09:15 Modify Source, Create Life and Colour Attributes
10:49 Final Improvements I: Pushing Stuck Particles
12:22 Final Improvements II: VDB Smooth
13:04 Outro

[illuminations-vfx]

I will be going over the render setups using Karma CPU as well as composite and colour grading in part two.
Didn't want this video to be too long. Check description for link to the 3D scan used in this video.

[voxyde]

When the hell did they add Potential Flow lmao. This is insane, really cool! Thanks for sharing

[AlexanderPyatkov]

vector grad = volumegradient (1, 0, @P);
float phi = volumesample (1, 0, @P);
grad *= phi ;
if ( phi < 0) {
@P -= grad;
}

[dindinrui]

Very good tutorial and carefully prepared the model.

[rubysnell]

Has anyone else run into a problem around the 9:00 minute mark, where their particles do not move at all? I just get the model gradually filling up with particles as they are born on the surface, but they don't follow the velocity fields at all

[ondudengrund]

Great tutorial, so much cool functionality there : )

[ModelWhatYouSee]

Anyone have any ideas on how to soften the amount of the VDB Potential Flow...or someway to animate it on and off?

[TarinPicker]

In 2:46, when you set vdbactivate1 node to reference, I can't see the "steam box" in my houdini. Do you know how can I visualize it? Thank you for the tutorial.

[andreaschristidis]

Insane, but how is it possible to all my vel should follow a certain "point" direction ?

[kobiohanna]

Hi thanks for this, can you please reupload project file? :)

[LukeMagdaP]

Which UI theme are you using and where can one download it?

[rendermanpro]

Is it custom system font, or what UI scale do you use? Text looks sharper and better than from direct video output from the system to my monitor. What the heck...
And tutorial is very well made!

[TroubleShotVFX]

I amazes me that such a commonly used setup still needs custom vex scripting.

[MotionDesignersCommunityTV]

Hey Mats, do you have any email or socials by any chance ?