Add missing keywords.

com.unity.render-pipelines.high-definition/HDRP/Material/TerrainLit/TerrainLit.shader

             #pragma multi_compile _ DIRLIGHTMAP_COMBINED
             #pragma multi_compile _ DYNAMICLIGHTMAP_ON
             #pragma multi_compile _ SHADOWS_SHADOWMASK
+            // Setup DECALS_OFF so the shader stripper can remove variants
+            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT
 
             #define SHADERPASS SHADERPASS_GBUFFER
             #include "../../ShaderVariables.hlsl"
 
             HLSLPROGRAM
 
+            // In deferred, depth only pass don't output anything.
+            // In forward it output the normal buffer
+            #pragma multi_compile _ WRITE_NORMAL_BUFFER
+
+
+            #ifdef WRITE_NORMAL_BUFFER // If enabled we need all regular interpolator
+            #include "../Lit/ShaderPass/LitSharePass.hlsl"
+            #else
+            #endif
+
             #include "TerrainLitData.hlsl"
             #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"
 
             #pragma multi_compile _ DIRLIGHTMAP_COMBINED
             #pragma multi_compile _ DYNAMICLIGHTMAP_ON
             #pragma multi_compile _ SHADOWS_SHADOWMASK
+            // Setup DECALS_OFF so the shader stripper can remove variants
+            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT
+
             // #include "../../Lighting/Forward.hlsl"
             //#pragma multi_compile LIGHTLOOP_SINGLE_PASS LIGHTLOOP_TILE_PASS
             #define LIGHTLOOP_TILE_PASS

com.unity.render-pipelines.high-definition/HDRP/Material/TerrainLit/TerrainLit_Basemap.shader

             #pragma multi_compile _ DIRLIGHTMAP_COMBINED
             #pragma multi_compile _ DYNAMICLIGHTMAP_ON
             #pragma multi_compile _ SHADOWS_SHADOWMASK
+            // Setup DECALS_OFF so the shader stripper can remove variants
+            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT
 
             #define SHADERPASS SHADERPASS_GBUFFER
             #include "../../ShaderVariables.hlsl"
 
             HLSLPROGRAM
 
+            // In deferred, depth only pass don't output anything.
+            // In forward it output the normal buffer
+            #pragma multi_compile _ WRITE_NORMAL_BUFFER
+
+
+            #ifdef WRITE_NORMAL_BUFFER // If enabled we need all regular interpolator
+            #include "../Lit/ShaderPass/LitSharePass.hlsl"
+            #else
+            #endif
+
             #include "TerrainLitData_Basemap.hlsl"
             #include "../../ShaderPass/ShaderPassDepthOnly.hlsl"
 
             #pragma multi_compile _ DIRLIGHTMAP_COMBINED
             #pragma multi_compile _ DYNAMICLIGHTMAP_ON
             #pragma multi_compile _ SHADOWS_SHADOWMASK
+            // Setup DECALS_OFF so the shader stripper can remove variants
+            #pragma multi_compile DECALS_OFF DECALS_3RT DECALS_4RT
+
             // #include "../../Lighting/Forward.hlsl"
             //#pragma multi_compile LIGHTLOOP_SINGLE_PASS LIGHTLOOP_TILE_PASS
             #define LIGHTLOOP_TILE_PASS