vaNormal

Danger

This attribute only works with the “core profile” in Minecraft 1.17 and newer. It is recommended to use the “compatibility profile” with Iris for better support.

in vec3 vaNormal;

Valid Programs: all gbuffers/shadow

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The vertex normal vector attribute, equivalent to gl_Normal.xyz from the compatibility profile.

The normal vector from vaNormal is in model space (which varies for different geometry). It can be converted to view space using normalMatrix (or gl_NormalMatrix in the compatibility profile).