Arnold渲染器是一个多平台的渲染系统，此为Houdini版本，他能够创建无偏差的蒙特卡洛辐射度的真实感可视化，许多公司仍然使用它来处理电影中的广告和动画，例如，怪物之家，爱丽丝梦游仙境等等。
Arnold 渲染作品集合
Arnold v3.1.0 Houdini更新日志：
Enhancements
Texture baking (htoa#1075, core#6091, core#7206)
Operator serialization (htoa#1057)
Conversion scripts for alShader utility nodes (htoa#1088)
Assign material ROP (htoa#1069)
Improved sampling of spherical lights (core#5534)
Faster adaptive subdivision: Adaptive subdivision is now up to 2x to 3x faster even on a single thread. (core#2311, core#7186, core#7201, core#7229)
The matrix_multiply_vector and matrix_transform shaders have been reinstated. (core#7243)
Cryptomatte AOV shaders and filters are now being included as a part of the Arnold core package. (core#7301)
Edge detection can now be controlled using a STRING type user data called toon_id. This feature is enabled when user_id is checked. (core#7125)
A new cell_noise shader has been added which can create many different useful cell-like patterns. (core#5985, core#6051)
The standard_surface shader supports a new, energy-preserving sheen
effect designed to render cloth-like microfiber materials such as velvet (core#7234)
Fixes
Displacement/Bump scale issues with packed alembic primitives (htoa#1049, core#7286)
Alembic procedural curve attributes (htoa#1086)
Translation errors with subdiv_face_iterations (htoa#1077)
Alembic procedural curve’s width rendered incorrectly (htoa#1071)
Camera projection bug: camera incorrect for initial render (htoa#1064)
Remove old SHOP OTLs from the menus (htoa#1092)
Curves in alembic procedural cut short (core#6916)
Alembic curve user data expansion (core#7355)
Alembic curves sets radius on curves and points to width (core#7261)
Fix alembic array attribute expansion for regular properties (core#7242)
Skip invalid curves (core#6947)
Rename user data parameters that clash with shape nodes in alembic expansion (core#7076)
