Properties
Houdini has the concept of Render Properties which represent all the possible options available for a particular rendering system. For highly flexible production renderers the number of options and configurations can be overwhelming to users. By default a user friendly subset of these properties are created on the various nodes by default. This keeps the UI simple and mostly clutter free. The downside is that if these extra options are desired the user must open the Parameter Interface and add these properties.
The Houdini-pbrt-v3 export follows this workflow as well despite having a limited number of properties as seen below.
The key properties are the Geometry ones as well as the pbrt_interior and pbrt_exterior Shader properties. (The others are available on the ROP by default.)
| Property | Default | Description |
|---|---|---|
| pbrt_rendersubd | off | If on, render Polys as loopsubdiv shapes |
| pbrt_subdlevels | 3 | Number of subdivisions levels to apply |
| pbrt_computeN | on | Whether to add point normals to Polys if no normals exist |
| pbrt_ignorevolumes | off | If enabled, don't export smoke volumes if they exist in the object |
| pbrt_ignorematerials | off | If enabled, ignore any materials applied to the geometry |
| pbrt_splitdepth | 3 | Default setting for curve split depths |
| pbrt_curvetype | flat | Default setting for any curves within the object |