mdl_get_argument
Gets an argument from a MDL material instance or function call.
arguments
- "argument_name" : String
The name of the argument to get the value for.
- "element_name" : String
The name of the MDL material instance or function call to get the argument from.
- "evaluate_field_accessors" : Boolean (default: true)
If an argument is attached to a structure field accessor then evaluate the accessor and return the name of the actual MDL function called and the field rather than the name of the accessor function.