本插件是由solidangle机构出品的HtoA渲染器Houdini插件V1.9.0版，SolidAngle HtoA v1.9.0 for Houdini Win Mac Linux，大小：90 MB，支持Houdini软件，支持Win系统，语言：英语。
SolidAngle MtoA是玛雅，softimage和houdini的渲染器，ArnoldRender是著名照片级逼真渲染系统，像怪物的房子贝奥武夫爱丽丝仙境 2012 o Lluvia de albndigas 和更多的电影和广告动画系列的无偏蒙特卡罗光线跟踪。
SolidAngle HtoA v1.9.1 for Houdini Win
Automatically generate TX textures: Tiled and mipmapped TX textures will now be automatically generated for each image shader. This behavior can be disabled per texture. In addition, the TX texture will be linearized according to the colorspace parameter. The linear, sRGB and Rec.709 colorspaces are currenlty supported. The default value auto will heuristically determine the colorspace from the bit depth and type of the texture. Changes to the texture filename and colorspace will correctly trigger IPR changes and rebuild the TX texture if necessary. Note that UDIM textures are handled and will generate a TX texture for each tile. Lasty, a reload button is available to force TX regeneration, flushing of texture cache and IPR update (htoa#497)
Improved stereo rendering: The filename parameter of the beauty and AOVs rendered separately now accept the [EYE] token to be specified in the path. When such a token is detected in a filename, the scene will be rendered once for each camera specified in the vm_cameralist parameter of a stereo camera rig, and the [EYE] token will be replaced by the camera name in the path. Also the camera selection will now obey the stereo eye selected in the Edit > Stereo Eye menu (stereo, left, right or center) (htoa#654)
UV Transform shader: A new shader that alters the UV coordinates before evaluating the shader connected to its passthrough input, with 2 highly tweakable nested transforms and various options for repetitions and symmetries (csp#88)
Pattern for ramp shaders: The ramp_rgb and ramp_float shader have and additional Pattern parameter to output values according to UVs, with different patterns such as circular, radial, box, etc. (htoa#723)
Force export materials: You can now specify on the Arnold ROP a list of materials to export regardless of whether they are assigned to an object or primitive (htoa#593)
Angular velocity for instance motion blur: The angular velocity attribute w is now taken into account when motion blurring point instances. Moreover the transform defining attributes such as N, orient, rot, pscale, up, v, trans and pivot are sampled at each time step, allowing complex motion blur of the instances transform (htoa#712)
Licensing dialog: Available from the Arnold menu, a simple dialog to troubleshoot and install license files. You can query the license status, save diagnostic information to a file to send to support or copy your host ID to the clipboard to generate a node-locked license (#724)
New metadata for shader UI: Numerous new metadata have been added to customize shader parameters, UI and behavior, such as houdini.join_next, houdini.no_label, houdini.callback, and extra parameter metadata to create additional separators, ramps, toggles, menus and buttons. See documentation for details (htoa#497)
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