Supported And Unsupported Features

Octane supports only a subset of the OSL standard, plus a few extensions to use features specific to Octane.

Unsupported features

Point cloud functions
Dictionary lookup functions
Message passing is generally not supported, except for the built-ins listed under "Octane extensions" (see below).
Derivatives
trace(). For AO like effects, you can add a color input and connect the input pin to a dirt node
MaterialThe representation of the surface or volume properties of an object. shaders and closure variables
wavelength color(). Use _gaussian() instead
struct variable types
The global variables Ps and dPdt

Partially supported features

noise() doesn't support 4D noise, and doesn't support the "simplex" and "gabor" noise types
The global variable time always has a value between 0 and 1, and represents the time within a subframe
getmessage() and gettextureinfo() must have string literals as attribute names