Fix compilation errors

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

 #include "CoreRP/ShaderLibrary/Sampling/SampleUVMapping.hlsl"
 #include "../MaterialUtilities.hlsl"
 
+#include "TerrainLitSplatCommon.hlsl"
+
 // We don't use emission for terrain
 #define _EmissiveColor float3(0,0,0)
 #define _AlbedoAffectEmissive 0
 
 #include "../Decal/DecalUtilities.hlsl"
-#include "TerrainLitSplatCommon.hlsl"
 
 void GetSurfaceAndBuiltinData(inout FragInputs input, float3 V, inout PositionInputs posInput, out SurfaceData surfaceData, out BuiltinData builtinData)
 {
 #if defined(DEBUG_DISPLAY)
     if (_DebugMipMapMode != DEBUGMIPMAPMODE_NONE)
     {
-        surfaceData.baseColor = GetTextureDataDebug(_DebugMipMapMode, layerTexCoord.base0.uv, _BaseColorMap0, _BaseColorMap0_TexelSize, _BaseColorMap0_MipInfo, surfaceData.baseColor);
+        // TODO: uncomment and fix me.
+        surfaceData.baseColor = 1;
+        // surfaceData.baseColor = GetTextureDataDebug(_DebugMipMapMode, input.texCoord0, _BaseColorMap0, _BaseColorMap0_TexelSize, _BaseColorMap0_MipInfo, surfaceData.baseColor);
         surfaceData.metallic = 0;
     }
 #endif

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

 #include "CoreRP/ShaderLibrary/Sampling/SampleUVMapping.hlsl"
 #include "../MaterialUtilities.hlsl"
 
+#include "TerrainLitSplatCommon.hlsl"
+
 // We don't use emission for terrain
 #define _EmissiveColor float3(0,0,0)
 #define _AlbedoAffectEmissive 0
 
 #include "../Decal/DecalUtilities.hlsl"
-#include "TerrainLitSplatCommon.hlsl"
 
 void GetSurfaceAndBuiltinData(FragInputs input, float3 V, inout PositionInputs posInput, out SurfaceData surfaceData, out BuiltinData builtinData)
 {
 #if defined(DEBUG_DISPLAY)
     if (_DebugMipMapMode != DEBUGMIPMAPMODE_NONE)
     {
-        surfaceData.baseColor = GetTextureDataDebug(_DebugMipMapMode, layerTexCoord.base0.uv, _BaseColorMap0, _BaseColorMap0_TexelSize, _BaseColorMap0_MipInfo, surfaceData.baseColor);
+        // TODO: uncomment and fix me.
+        surfaceData.baseColor = 1;
+        // surfaceData.baseColor = GetTextureDataDebug(_DebugMipMapMode, input.texCoord0, _BaseColorMap0, _BaseColorMap0_TexelSize, _BaseColorMap0_MipInfo, surfaceData.baseColor);
         surfaceData.metallic = 0;
     }
 #endif

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

 #include "TerrainLitDataMeshModification.hlsl"
 #endif
 
+// Declare distortion variables just to make the code compile with the Debug Menu.
+// See LitBuiltinData.hlsl:73.
+TEXTURE2D(_DistortionVectorMap);
+SAMPLER(sampler_DistortionVectorMap);
+
+float _DistortionScale;
+float _DistortionVectorScale;
+float _DistortionVectorBias;
+float _DistortionBlurScale;
+float _DistortionBlurRemapMin;
+float _DistortionBlurRemapMax;
+
 float GetSumHeight(float4 heights0, float4 heights1)
 {
     float sumHeight = heights0.x;

com.unity.render-pipelines.high-definition/HDRP/Sky/AtmosphericScattering.meta

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