The environment variable for RfH must be listed first in the houdini.env file. (Windows requires a semi-colon) For example:

HOUDINI_PATH=$RFHTREE/18.5.351:&

RenderMan for Houdini 23 when using Solaris only requires an additional line in the configuration file:#Uncomment the following line only when using Solaris

#RMANRMAN_PROCEDURALPATH = $RFHTREE/18.5.351/openvdb:&

RenderMan for Houdini 23 on Windows now requires an additional line in the configuration file:

PATH=$RMANTREE\bin;&

Additional instructions and details are found below in this document.

RMANTREE=/opt/pixar/RenderManProServer-23.5
RFHTREE=/opt/pixar/RenderManForHoudini-23.5
RMAN#Uncomment the following line only when using Solaris
#RMAN_PROCEDURALPATH = $RFHTREE/18.5.351/openvdb:&
HOUDINI_PATH=$RFHTREE/18.5.351:&