Updated GenericHand shader to normalise normals to prevent outline scaling issues with hand rigs that don't normalize the normal vector

Author: Max Palmer

Packages/Tracking/Hands/Runtime/Shaders/BiRP and URP/GenericHandShader.shader

@@ -349,7 +349,9 @@
 
                 #if _USEOUTLINE_ON
                 float3 norm = mul((float3x3)UNITY_MATRIX_IT_MV, v.normal);
-                float2 offset = TransformViewToProjection(norm.xy);
+                // Some hand models may include non normalized (length) normals
+                float3 normalizedVector = normalize(norm);
+                float2 offset = TransformViewToProjection(normalizedVector.xy);
                 o.pos.xy += offset * _Outline;
                 #endif