FXPHD – HOU235 – Houdini Vellum Workflow on The Battle for Bazoches

本课程由教授兼视觉特效艺术家 Liam Whitehouse 讲授，涵盖 Houdini Vellum 工作流程，用于创建绳索、不同类型的布料、软体对象、变形毛发对象和刚体动态模拟。Houdini Vellum 的独特之处在于它将各种模拟系统结合在一起，并允许它们以逼真的方式无缝交互，从而创造出令人惊叹的视觉特效，包括附着在绳索上的布料和覆盖着毛发的软体。
第 1 课：概述
查看项目文件并了解 Vellum 的各种系统以及如何使用它们在我们的 vfx 序列中创建模拟动态元素。可以使用 Vellum 模拟包括绳索、头发、布料、软体和刚体的模拟系统相互作用，因此我们将了解如何设置它。

第 2 课：绳子和布料
如何使用 Vellum 绳约束和布料约束设置附着在布料上的绳索。我们将研究控制绳索柔韧性和布料折叠的设置。我们还将了解如何创建程序性 rbd vellum 对象，这些对象与布料和绳索动态交互并进行模拟。

第 3 课：布料模拟
Houdini 中牛皮纸布料模拟概述。我们将使用在户外随风飘扬的帐篷资产，并研究如何控制牛皮纸布料的所有功能，以复制不同类型的织物，控制织物对折叠或重力的抵抗力，并在场景中设置波纹风效果。

第四课：模拟
我们结合 Vellum 知识，将 Vellum 绳索、布料模拟和 RBD 对象附加到可操作的基于物理的对象上。通过使用子弹解算器实现 RBD 模拟并将 Vellum 绳索和布料附加到对象上，我们可以获得高细节动画，这让我们具有很强的规模感和重量感。

第五类
如何设置软体对象并控制其灵活性和抗压性，以及如何设置软体模拟的膨胀和内部气压。如何将动态毛发系统附加到软体变形对象以及如何添加 Karma XPU 毛发着色器以从 Vellum 渲染毛发视觉特效。

Duration 2h 49m MP4

Title: FXPHD – HOU235 – Houdini Vellum Workflow on The Battle for Bazoches

Info:
This course, from professor and VFX artist Liam Whitehouse, covers the Houdini Vellum workflow for creating ropes, cloth of different types, soft body objects, deforming fur objects, and rigid body dynamic simulations. Houdini Vellum is unique in that in combines various simulation systems together and allows them to seamlessly interact together in a realistic way to create amazing vfx including cloth attached to ropes and soft bodies covered in fur.
Class 1: Overview
A look at the project files and learning about the various systems of Vellum and how we can use them to create simulated dynamic elements in our vfx sequence. Simulation systems including ropes, hair, cloth, soft bodes and rigid bodies can be simulated interacting together using vellum, so we will see an into to how this can be setup.

Class 2: Rope & Cloth
How to setup ropes attached to cloth using Vellum string constraints and cloth constraints. We will look at settings to control the flexibility of the rope and the folding of the cloth. We will also see how to create procedural rbd vellum objects which interact and simulate with the cloth and the rope dynamics together.

Class 3: Cloth simulations
An overview of vellum cloth simulations in Houdini. We will use a tent asset which is blowing in the wind outdoors and look at how we can control all the functions for vellum cloth to replicate different types of fabric, control how resistant the fabric is to folding or gravity and also setup a rippling wind effect on our scene.

Class 4: Simulation
We combine our Vellum knowledge to attach vellum ropes, cloth simulation and RBD objects to an operational physics-based object. By implementing RBD simulation using the bullet solver and attaching vellum ropes and cloth to our object, we can get high detail animation which gives us a great sense of scale and weight.

Class 5
How to setup soft body objects and control their flexibility and compression resistance, as well as how to set the inflation and internal air pressure of soft body simulations. How to attach dynamic hair systems to soft body deforming objects and how to add the Karma XPU hair shader to render your fur vfx from Vellum.