This page provides information on the OSL Material Node in V-Ray for Blender.
Overview
The VRayOSLMtl material can be used to load OSL shader code files (.osl) or OSL object code files (.oso) and render them directly with V-Ray.
UI Path
||Node Editor|| > Add > Material > OSL Material
Node
Internal – Use internal text data-block.
External – Use external .osl or .oso file.
