花朵燃烧灰烬飘散VFX效果课程 Ash Disintegration – Houdini & Nuke VFX Course

This effect is achieved through a method which is essentially layering two different simulations that run at the same time.

这种效果是通过一种方法实现的，该方法本质上是将同时运行的两个不同的模拟分层。

Fracturing

We will start by fracturing the rose geometry, using a custom fracture method, which combines the common voronoi workflow with the boolean fracturing method.

我们将首先使用自定义断裂方法对玫瑰几何体进行断裂，该方法将常见的 voronoi 工作流程与布尔断裂方法相结合。

Custom Solver

After we fracture the geometry, we are going to run the first simulation which will operate on our fractured pieces, and we are going to create a

custom solver that drives this simulation.

在我们断裂几何体之后，我们将运行第一个模拟，该模拟将在我们的断裂件上运行，我们将创建一个

驱动此模拟的自定义求解器。

First Simulation

And then on top of this simulation we will run a second simulation that will make each individual fractured piece turn into even smaller pieces that disappear entirely over time.

So essentially, the geoemtry will first disintegrate into big pieces, and then these pieces will disintegrate into even smaller pieces, and we will be able to control

this transition between simulations seamlessly.

然后，在此模拟之上，我们将运行第二次模拟，使每个单独的断裂碎片变成更小的碎片，并随着时间的推移完全消失。

所以本质上，几何体首先会分解成大块，然后这些块会分解成更小的块，我们将能够控制

模拟之间的过渡是无缝的。

Rendering

After we set up all of the geometry and effects, we will render a few passes using Redshift. In this section I also go over how to export custom AOVs such as custom textures and houdini point attributes.

设置完所有几何体和效果后，我们将使用 Redshift 渲染一些通道。 在本节中，我还将介绍如何导出自定义 AOV，例如自定义纹理和 houdini 点属性。

Nuke Compositing

Then we will bring everything inside of Nuke to create the final result.

Here I go over how to leverage the AOVs that we generated to have complete control over all aspects of the final look.

然后我们将把 Nuke 中的所有内容引入到最终的结果中。

在这里，我将介绍如何利用我们生成的 AOV 来完全控制最终外观的各个方面。