Houdini Tutorial: Advanced Velocity Fields I - Simulation Setup

Links:
Project Files: nymanfx.gumroad.com/l/ikqdby
3D Scan Used in Video: threedscans.com/nouveau-musee...
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

[@mnymanVFX]

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

[@mnymanVFX]

Thank you so much Voxyde! Love your videos.

[@ondudengrund]

Great tutorial, so much cool functionality there : )

[@dindinrui]

Very good tutorial and carefully prepared the model.

[@kegsfx8603]

This is great! Nice work :)

[@spectrewashere]

Thanks Mat! great tut

[@vfxskull6208]

Amazing, thanks!

[@value_exe]

really good tutorial! thanks

[@yavkoch1071]

thanks for the tutorial!

[@maksimfilipovich]

thanks for sharing

[@massimobaita7178]

Thank You very much!

[@mendostudio63]

I just subscribed for you 😁😁

[@caniseemy7016]

good

[@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!

[@mnymanVFX]

Pretty sure I was using the Slate UI theme and scaling up the interface in the preference. I reformatted my computer so I cannot remember the exact values. Try to increase the UI scale and restart Houdini.

[@ModelWhatYouSee]

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

[@LukeMagdaP]

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

[@AlexanderPyatkov]

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

[@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.

[@mnymanVFX]

Are you sure you are not in wireframe mode? Is it visible if you press W in the scene viewer?

[@everytimehappywithsongs341]

thanks mate

[@mnymanVFX]

Probably sometime next week as I am very busy with work until then. Wont be too long :)

[@everytimehappywithsongs341]

@@mnymanVFX ohk

[@andreaschristidis76]

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

[@TroubleShotVFX]

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

[@mnymanVFX]

You could do it in VOPs, but I get what you mean. Houdini is very low level by design.

[@MotionDesignersCommunityTV]

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

[@mnymanVFX]

Hey, my email is [e-mail] Feel free to contact me! :)