Installation Path Variables
You will need to set a few environment variables to get RfK up and running with PRMan and Katana. RfK looks for RenderMan on the $RMANTREE environment variable. As long as $RMANTREE is set correctly, RfK will find the appropriate PRMan libraries and commands. Katana finds RfK in the same way it would find any other plugin - through the $KATANA_RESOURCES environment variable. The paths for these environment variables will depend on whether you install RfK/PRMan in the default locations or not.
|Environment Variable||Default Installation Paths|
RMAN_RIXPLUGINPATHenvironment variables to include your specific paths.
Output Path Variable
During startup RenderMan for Katana will automatically load all "discoverable" shaders. Shaders are discoverable if they are found in a search path and (for non-OSL shaders) have an associated Args file. The standard shader search path mechanism is used when searching for shaders with search paths specified either with PrmanGlobalStatements settings or environment variables:
|ShaderType||Environment Variable||PrmanGlobalStatements attribute||Default Path|
If both the environment variable and the attribute are set the resulting search path will be the union of the two strings.
RfK will automatically recurse down a shader path to find shaders in subdirectories. By default it will recurse down 3 subdirectories. This is configurable using the
shaderPathRecursionLimit setting in the RfK config file,
The args files need to be in an Args directory. See the setup in RMANTREE/lib/plugins for an example. Something like this:
You can find out more about Args files in the developer docs download.