View source for Live 2022.11.15

= Foam Sprayers =
[[File:content_thumbnail_2022_11_15.jpg | 960px]]
== Introduction ==
This was my attempt trying to recreate the foam techniques from [https://xk.studio/XKR_002-PROTECT the amazing PROTECT project from XK Studio].  Shown below is one of the frames from their project that I used as reference.

[[File:2022_11_15_XK-Studio-XKR_002-Protect3.jpeg | 960px]]


For more insight in to their process and development, take a look at their video here: [https://twitter.com/xk_studio/status/1575807058355445760/video/1 XK Studio BTS]


Below are some of my results while testing and iterating on simulation settings.

[[File:2022_11_15_foam_settings_flbk.gif| 960px]]

= Video On Demand =
== Part 1 ==
<embedvideo service="youtube" dimensions="960x540" urlargs="modestbranding=1&showinfo=0">https://youtu.be/Zd1PIjUXyhU</embedvideo>

* 00:00 Introduction
* 00:50 Flipbook iterations
* 06:10 Scene walkthrough
* 06:30 Vellum wire simulation setup
* 09:50 Setting up the FLIP emission source
* 12:33 Initial velocity for FLIP emission
* 14:10 Procedural noise from rest coordinates
* 15:28 FLIP simulation overview
* 15:50 VEX wrangle to control divergence
* 18:50 Surface tension settings
* 20:35 Post simulation workflow
* 23:10 Visualize shader noise from rest attribute
* 39:10 Visualize age particle attribute
* 44:18 Visualizing divergence in FLIP simulation
* 51:00 Wrapping up and overview


== Part 2 ==
<embedvideo service="youtube" dimensions="960x540" urlargs="modestbranding=1&showinfo=0">https://youtu.be/bmGEJe4bVe4</embedvideo>

* 00:16 Introduction
* 02:30 Adjusting Vellum bend stiffness
* 02:40 Rotating emitters
* 03:10 Increase Vellum substeps for inter-frame motion
* 03:35 Update flipsource and rest assignment
* 04:50 Flatten all surface VDBs into one
* 06:58 Divergence and viscosity control using VEX
* 12:15 Visualizing rest texture coordinates
* 13:20 Using and age and life to find emission time
* 15:50 How emission time is used to offset texture coordinates
* 17:50 VEX calculation of particle emission time
* 18:30 Using sin funtion with emission time
* 25:00 Redshift procedural noise from the rest attribute
* 28:30 Scaling and adjusting the noise
* 29:00 Visualize the noise value
* 32:45 Comparing noise results when rest attribute is used
* 36:30 Using RS State VOP to retrieve the rest attribute
* 38:40 Using color ramps with rest
* 39:10 Visulaizing displacement quality wireframe
* 43:00 Subsurface radius and color
* 49:00 Detecting and removing droplets after the sim
* 57:50 Customizing the Houdini menu
* 59:00 Wrapping up


= Scene File =
== Part 1 ==
[[:File:22_11_15_foam_sprayers_pt1.hiplc | 22_11_15_foam_sprayers_pt1.hiplc]]

== Part 2 ==
[[:File:22_11_20_foam_sprayers_pt2.hiplc | 22_11_20_foam_sprayers_pt2.hiplc]]