Added stencil setup in UTSAPI;

Changed hair shadow length from screen space to world space;

Runtime/Shaders/HDRPToon.shader

@@ -753,7 +753,6 @@ Shader "HDRP/Toon"
                 Pass Replace
             }
 
-
             HLSLPROGRAM
             #pragma multi_compile _ DEBUG_DISPLAY
             #pragma multi_compile _ LIGHTMAP_ON
@@ -811,8 +810,8 @@ Shader "HDRP/Toon"
             #pragma shader_feature_local_fragment _ENABLE_FOG_ON_TRANSPARENT
 
 
-            #define PUNCTUAL_SHADOW_MEDIUM
-            #define DIRECTIONAL_SHADOW_MEDIUM
+            #define PUNCTUAL_SHADOW_LOW
+            #define DIRECTIONAL_SHADOW_LOW
             #define AREA_SHADOW_MEDIUM
 
         #ifndef SHADER_STAGE_FRAGMENT
@@ -929,7 +928,17 @@ Shader "HDRP/Toon"
             Cull Front
 
             ZWrite On
-            ZTest LEqual 
+            ZTest LEqual
+
+            // // NOTE: We disable taa and tau for outline because it can't provide motion vector. This will reduce the ghosting but introduce some jittering.
+            // // Worth it to write motion vector for outline? It will introduce additional drawcall.
+            // Stencil
+            // {
+            //     WriteMask 3
+            //     Ref 0
+            //     Comp Always
+            //     Pass Replace
+            // }
 
             HLSLPROGRAM