Shaders and Cg/HLSL Programming - Unity 4 Game Development - page 658

Type Description

float3 worldRe-
fl;
INTERNAL_DATA

This will contain the world reflection vector if the surface shader writes to o.Normal . To get the reflection vector
based on per-pixel normal map, use WorldReflectionVector (IN, o.Normal) . See the Reflect-Bumped
shader for example.

float3
worldNormal;
INTERNAL_DATA

This will contain the world normal vector if the surface shader writes to o.Normal . To get the normal vector based on
per-pixel normal map, use WorldNormalVector (IN, o.Normal) .