Arnold OpenVDB Volume - Arnold for Katana
Volume file formats, such as OpenVDB, will allow storage of much larger datasets while being optimized for random access to volume data, which is more efficient for rendering.
OpenVDB is an open source C++ library comprising a novel hierarchical data structure and a suite of tools for the efficient storage and manipulation of sparse volumetric data discretized on three-dimensional grids.
* Volumes can only receive indirect lighting from other emissive volumes when the volume_ray_depth is above 0.
- More information about volume step_size can be found here.
Custom AOVs are not currently supported with volumes.
OpenVDB
The default volume plugin is OpenVDB. In addition to the ray extents acceleration, auto bounding box and auto step size of the new volume API, it brings several production features such as velocity motion blur, scaling of velocity and step size and the ability to disable ray extents acceleration.
Volume AOVs
A list of available AOVs associated with volumes . Each option creates a separate AOV render pass for that component.
- Volume
- Volume Direct
- Volume Indirect
- Volume Opacity
Custom AOVs are not currently supported with volumes.