Lentil is compiled against Arnold 6.2.0.0. Any earlier version will not work.
Option 1: Set the following environment variables, replacing $PATH_TO_LENTIL with the actual path on your machine.
ARNOLD_PLUGIN_PATH = $PATH_TO_LENTIL/bin/$operating_system
MTOA_TEMPLATES_PATH = $PATH_TO_LENTIL/ae
Option 2: It’s also possible to copy the files into your MtoA install. Copy the files like this:
Files in /bin/$operating_system go to $MTOA_LOCATION/shaders
Files in /maya/ae go to $MTOA_LOCATION/scripts/mtoa/ui/ae
Step 1 - Option 1: Set the following environment variables, replacing $PATH_TO_LENTIL with the actual path on your machine.
ARNOLD_PLUGIN_PATH = $PATH_TO_LENTIL/bin/$operating_system
Step 1 - Option 2: It’s also possible to copy the files into your HtoA install. Copy the files like this:
Files in /bin/$operating_system go to $HTOA_LOCATION/arnold/plugins
Files in /bin/$operating_system go to $C4D_INSTALL/plugins/C4DtoA/shaders
Files of type .str in /c4d/strings_us go to $C4D_INSTALL/plugins/C4DtoA/res/strings_en-US/description
Files of type .res and .h in /c4d/description go to $C4D_INSTALL/plugins/C4DtoA/res/description
More information can be found here.
Files in /bin/$operating_system go to $3DSMAX_LOCATION/Plugins/MaxToA
No custom UI files have been made for 3dsmax yet. If there's a need for a better parameter layout than the automatic translation by maxtoa, please let us know. See this page for more information.
To use cryptomatte, you need to replace the cryptomatte library that comes with the arnold install. The patched library can be found in /cryptomatte/your_operating_system/cryptomatte.(dll/so/dylib). The replacement is required because we need to hook up a lentil_filter instead of a cryptomatte_filter to the automatically-created cryptomatte AOVs. It is recommended you make a backup of the cryptomatte file in case you need to render with the default cryptomatte sometime in the future.
The default cryptomatte library can be found in various places for the various DCC's. It is best to do a simple search for "cryptomatte" within your arnold install directory.