mathe/Library/PackageCache/com.unity.shadergraph@14.0.8/Documentation~/Evaluate-Refraction-Data-Water-Node.md

Evaluate Refraction Data

This node calculates water refraction.

The High Definition Render Pipeline (HDRP) uses this node in the default water shader graph. See the HDRP documentation for more information about the Water System.

Render pipeline compatibility

Node	Universal Render Pipeline (URP)	High Definition Render Pipeline (HDRP)
Evaluate Refraction Data	No	Yes

Ports

Name	Direction	Type	Description
NormalWS	Input	Vector3	The water surface normal in world space.
LowFrequencyNormalWS	Input	Vector3	The low frequency normal of the water surface in world space. This is the normal of the water surface without high frequency details such as ripples.
RefractedPositionWS	Output	Vector3	The refracted position of the water bed you observe through the water, in world space.
DistortedWaterNDC	Output	Vector2	The screen space position of the refracted point.
AbsorptionTint	Output	Vector3	An absorption factor that HDRP uses to blend between the water surface and the refracted underwater color.