Support for Houdini 17.0 & 17.5 on Windows, macOS, and Linux.



  • Reduced memory usage by 27%.

    • 50 million voxels is theoretically achievable on an 8GB graphics card, however 45 million is a more realistic value.

  • There is no longer a limit on how many source voxels you can use during any time step. The voxel limit and the source limit are now the same.

  • The device fallback algorithm now catches some OpenCL errors at compile time and will try the other devices on your system should it occur.

    • In most cases this mean falling back to your CPU unless you have another graphics card installed.

  • You can now force a specific device even if the solver thinks it is not possible given the memory requirements. Doing this may result in unstable behavior.

  • The source node is now faster and uses compiled for loops to merge volumes.


  • Fixed memory leak on source arrays.

  • Houdini 17.5 renders vec3 VDBs in the viewport now. The solver's velocity field is now hidden and won't render when displayed in the viewport to address this change.

  • Fixed a license issue on Windows that was forcing the solver to connect to the license server every time a user created a new instance. Now it should only connect every few days.

  • An issue with AMD graphics cards was identified that caused artifacts in some solver steps. There appeared to be a race condition with one of the OpenCL kernels and it has been modified to address this issue. Nvidia graphics cards should not have been affected.

New Products: Plug-In, HDA

Matthew Puchala