How do I setup licensing for the render farm?
  • Mantra is per machine - not per core.
  • Each time you call mantra, it will use 1 Mantra token

To set up more render nodes and access your unlimited supply of Mantra tokens, please contact or

Houdini rendering process is divided into two parts:

IFD generation, (similar to generating RenderMan rib files), and "writing" the pixels themselves.

When you hit the render button in Houdini, the IFD generation can be done either in the background, (where the .ifd is simply written to memory and not to disk), or you can choose to write the .ifd to disk. This part of the process takes either a Houdini-FX, Houdini-Core or a Houdini-Engine license.

The pixel writing part uses a Render (mantra) license. If you had previously rendered .ifd files to disk, you can distribute those to the render farm, and use the Render (mantra) licenses to generate the final picture.

Generally, our users will have a queueing software, (such as our HQueue), that will distribute the IFD generation depending on how many Houdini-FX, Houdini-Core and Houdini-Engine licenses you have. Once the IFD generation is done, the queueing software will then distribute the renders to the render machines, depending on how many mantra licenses are available, (please remember mantra licenses are free).

If you do not hold an Engine license. You can render the IFDs to disk with the interactive session of Houdini, and then distribute the IFDs to be renderer by the mantra tokens.

Having Houdini Engine licenses helps you speed up your renders, as the IFD writing part is the most time consuming. At the same time, having an Engine license allows your artists to keep working on their Houdini files.