Arnold for Houdini (or HtoA) provides a tight bridge to the Arnold renderer from within the standard Houdini interface, in a way that is familiar to both Houdini users and Arnold users in Maya or Softimage. It also enables smooth lighting workflows between Houdini and other DCC applications, since setups can be exported and shared.

Features:

All Arnold cameras (perspective, orthographic, spherical, fisheye) with depth of field and advanced shutter controls.

All Arnold lights (point, distant, spot, quad, disk, cylinder, skydome, mesh) with light filters and accurate viewport representation.

Custom Arnold shading network context with a comprehensive list of 106 shaders and utilities.

Atmospheric and background effects.

Volume rendering with support for OpenVDB and particles.

Polymeshes, curves, points with support for displacement and bump mapping and subdivision.

Procedurals, with sample Alembic and mandelbulb implementations.

Accurate motion blur (transform, deform, velocity, acceleration), overridable per object.

Geometry attributes translation as user data.

Optional Arnold properties for objects and cameras.

Render to AOVs, in single or separate files.

Support all Houdini rendering contexts (render region, mplay, render viewer, render COP, batch), with support for AOVs and clickable buckets.

Interactive rendering (IPR) allows parameter changes to be rapidly previewed without interrupting your work.

Instancing.

Multi-camera renders.

DeepEXR support.

Houdini（或HtoA）的Arnold在标准Houdini界面中为Arnold渲染器提供了一个紧密的桥梁，Houdini用户和Maya或Softimage中的Arnold用户都熟悉这种方式。它还可以在Houdini和其他DCC应用程序之间实现平滑的照明工作流程，因为可以导出和共享设置。

特征：

所有具有景深和高级快门控制功能的Arnold相机（透视，正交，球面，鱼眼）。

所有Arnold灯（点，远，点，四边形，圆盘，圆柱，天幕，网格）都带有滤光片和精确的视口表示。

自定义Arnold着色网络上下文，包含106个着色器和实用程序的完整列表。

大气和背景效应。

体积渲染支持OpenVDB和粒子。

聚合物，曲线，点支持位移和凹凸贴图和细分。

程序，使用示例Alembic和mandelbulb实现。

准确的运动模糊（变换，变形，速度，加速度），每个对象可覆盖。

几何属性转换为用户数据。

对象和摄像机的可选Arnold属性。

在单个或单独的文件中渲染到AOV。

支持所有Houdini渲染上下文（渲染区域，mplay，渲染查看器，渲染COP，批处理），支持AOV和可点击存储桶。

交互式渲染（IPR）允许快速预览参数更改，而不会中断您的工作。

实例化。

多相机渲染。

DeepEXR支持。