This is a raindrops setups in Houdini using pop solver. The behaviour of the drops are controlled by a custom brain written in vex. They search for little drops to consume and if they come too close to a trail of another big drop, they merge to it to follow the path of least resistance.
They also get bigger as they consume little drops and their acceleration increases.
You can download the setup at: gum.co/XBYZx
百度翻译：这是使用流行求解霍迪尼一个雨滴设置。液滴的行为被写在VEX定制的大脑控制的。他们寻找的点点滴滴消耗，如果他们过于接近另一大降的痕迹，它们融合到它沿着阻力最小的路径。
他们还得到更大，因为它们消耗的点点滴滴和他们的加速度增加。
您可以下载安装：gum.co/XBYZx

***This file is compatible with Houdini 17.5.327. Only simulation setup is provided. There is no lighting or rendering setups.