#ifdef _LAYERS_TWO
    #define _LAYER_COUNT 2
#else
    #if defined(_LAYERS_EIGHT) || defined(_LAYERS_SIXTEEN)
        #if defined(_LAYERS_EIGHT)
            #define _LAYER_COUNT 8          
        #endif
        #ifdef _LAYERS_SIXTEEN
            #define _LAYER_COUNT 16
        #endif
    #else
        #define _LAYER_COUNT 4
    #endif
#endif


#ifndef _TERRAIN_BLEND_HEIGHT
    #define _TERRAIN_BLEND_DENSITY // enable density blending by default and use DiffuseRemap.w to control whether the density blending is enabled for a layer
#endif

#define DECLARE_TERRAIN_LAYER_PROPS(n)  \
    float4 _Splat##n##_ST;              \
    float _Metallic##n;                 \
    float _Smoothness##n;               \
    float _NormalScale##n;              \
    float4 _DiffuseRemapOffset##n;      \
    float4 _DiffuseRemapScale##n;       \
    float4 _MaskMapRemapOffset##n;      \
    float4 _MaskMapRemapScale##n;       \
    float _LayerHasMask##n;             \
    float4 _Mask##n##_TexelSize;        \
    float4 _Specular##n;

#define DECLARE_TERRAIN_LAYER_PROPS_FIRST_4 \
    DECLARE_TERRAIN_LAYER_PROPS(0)          \
    DECLARE_TERRAIN_LAYER_PROPS(1)          \
    DECLARE_TERRAIN_LAYER_PROPS(2)          \
    DECLARE_TERRAIN_LAYER_PROPS(3)          \
    float4 _Control0_TexelSize;             \

#define DECLARE_TERRAIN_LAYER_PROPS_SECOND_4 \
    DECLARE_TERRAIN_LAYER_PROPS(4)          \
    DECLARE_TERRAIN_LAYER_PROPS(5)          \
    DECLARE_TERRAIN_LAYER_PROPS(6)          \
    DECLARE_TERRAIN_LAYER_PROPS(7)          \
    float4 _Control1_TexelSize;             \

#if defined(_LAYERS_EIGHT) || defined(_LAYERS_SIXTEEN)
        #define UNITY_TERRAIN_CB_VARS \
        DECLARE_TERRAIN_LAYER_PROPS_FIRST_4     \
        DECLARE_TERRAIN_LAYER_PROPS_SECOND_4    \
        DECLARE_TERRAIN_LAYER_PROPS(8)          \
        DECLARE_TERRAIN_LAYER_PROPS(9)          \
        DECLARE_TERRAIN_LAYER_PROPS(10)         \
        DECLARE_TERRAIN_LAYER_PROPS(11)         \
        float4 _Control2_TexelSize;             \
        DECLARE_TERRAIN_LAYER_PROPS(12)         \
        DECLARE_TERRAIN_LAYER_PROPS(13)         \
        DECLARE_TERRAIN_LAYER_PROPS(14)         \
        DECLARE_TERRAIN_LAYER_PROPS(15)         \
        float4 _Control3_TexelSize;             \
        float _HeightTransition;
#else
    #define UNITY_TERRAIN_CB_VARS \
        DECLARE_TERRAIN_LAYER_PROPS_FIRST_4 \
        float _HeightTransition;

#endif

#define UNITY_TERRAIN_CB_DEBUG_VARS \
    float4 _Control0_MipInfo;       \
    float4 _Splat0_TexelSize;       \
    float4 _Splat0_MipInfo;         \
    float4 _Splat1_TexelSize;       \
    float4 _Splat1_MipInfo;         \
    float4 _Splat2_TexelSize;       \
    float4 _Splat2_MipInfo;         \
    float4 _Splat3_TexelSize;       \
    float4 _Splat3_MipInfo;         \
    float4 _Splat4_TexelSize;       \
    float4 _Splat4_MipInfo;         \
    float4 _Splat5_TexelSize;       \
    float4 _Splat5_MipInfo;         \
    float4 _Splat6_TexelSize;       \
    float4 _Splat6_MipInfo;         \
    float4 _Splat7_TexelSize;       \
    float4 _Splat7_MipInfo;