This page provides information on the Volumetric Grid Input.
This page contains information on input channels that can be loaded and re-mapped for a VRayVolumeGrid. The input file loaded for the Volumetric Grid must be generated from the source program with channels mapped in such a way that VRayVolumeGrid can read them correctly. The input file is selected when the VRayVolumeGrid is first created, or in the Input rollout on the Modify panel.
VRayVolumeGrid is based on Phoenix FD, and in its core it supports the following channels:
Different applications use different channels and names for them. When loading f3d/vdb files, VRayVolumeGrid tries to automatically make the conversion to the supported channels. If a channel is not mapped by default, a channel can be manually set in the Input rollout on the Modify panel by clicking the Browse [...] button under Preview & Render Cache Path and choosing 3rd Party Channel Mappings from the pop-up menu. Note that this option appears on the pop-up menu only if no input file has been selected yet.
Certain FumeFX settings can be optimized to keep render times as low as possible:
A common problem with setting up distributed rendering for VRayVolumeGrid is that the rendering process might look for the cache files in a local machine directory. However, at the start of a network render, the scene file is copied to all render machines on the network to a new location, e.g. C:\Users\user\AppData\Local\backburner\Jobs\, while cache files are not automatically sent to the host machine. The cache files are not sent because they could potentially overload the host's disk space if they are very large, and also because in many cases not all of them are actually used in the rendering. This is why when the rendering begins, if the hosts are looking for the cache files in a directory that was originally on the local computer, the cache files won't be found.
The solution is to move the cache sequence to a shared folder on the network, or a mapped network drive, and set its path in the Input rollout using a network-visible UNC input path (a path that starts with \\). You can also browse from the Input rollout's path options.
if the path points to a drive on the local computer rather than a UNC path, a message will appear: "You are using local machine Input path with distributed rendering!".