{
  "materials": {
    "version": "1.0.0",

    "terrain_base": {
      "vertexShader": "shaders/renderchunk.vertex",
      "vrGeometryShader": "shaders/renderchunk.geometry",
      "fragmentShader": "shaders/renderchunk.fragment",

      "+defines": [ "LOW_PRECISION", "TEXEL_AA", "ATLAS_TEXTURE" ],
      "+states": [ "DisableAlphaWrite" ],

      "+samplerStates": [
        {
          "samplerIndex": 0,
          "textureFilter": "TexelAA"
        },
        {
          "samplerIndex": 1,
          "textureFilter": "Bilinear"
        },
        {
          "samplerIndex": 3,
          "textureFilter": "Point"
        },
        {
          "samplerIndex": 4,
          "textureFilter": "Point"
        }
      ],

      "vertexFields": [
        { "field": "Position" },
        { "field": "UV1" },
        { "field": "Color" },
        { "field": "UV0" }
      ],
      "msaaSupport": "Both",

      "textures": [
        {
          "textureIndex": 0,
          "textureLocation": "InUserPackage",
          "textureName": "atlas.terrain"
        },
        {
          "textureIndex": 1,
          "textureLocation": "Dynamic",
          "textureName": "Brightness"
        },
        {
          "textureIndex": 2,
          "textureLocation": "Dynamic",
          "textureName": "SeasonFoliage"
        }
      ],

      "variants": [
        { "fog": { "+defines": [ "FOG" ] } },
        { "lit": { "+defines": [ "ALWAYS_LIT" ] } },
        { "underwater": { "+defines": [ "FOG" ] } },
        { "fog.underwater": {  } },
        { "fading": { "+defines": [ "FOG", "ALLOW_FADE" ] } }
      ]
    },
    "terrain_opaque:terrain_base": {

      "+variants": [
        { "underlava": { "+states": [ "DisableCulling" ] } }
      ]
    },
    "terrain_opaque_seasons:terrain_base": {
      "+defines": [ "SEASONS" ],
      "+samplerStates": [
        {
          "samplerIndex": 0,
          "textureFilter": "TexelAA"
        },
        {
          "samplerIndex": 1,
          "textureFilter": "Bilinear"
        },
        {
          "samplerIndex": 2,
          "textureFilter": "Point"
        }
      ]

    },

    "terrain_blend:terrain_base": {
      "+defines": [ "BLEND" ],
      "+states": [
        "Blending"
      ],
      "+variants": [
        { "underwater": { "+states": [ "InvertCulling", "EnableStencilTest" ] } },
        { "fog.underwater": {  } }
      ]
    },

    "terrain_blend_far:terrain_blend": {
      "+defines": [ "FOG" ]
    },

    "terrain_blend_no_culling:terrain_blend": {
      "+states": [
        "DisableCulling"
      ]
    },

    "terrain_water:terrain_blend": {
      "+defines": [ "NEAR_WATER" ],

      "+states": [
        "Blending"
      ],

      // Fix z-fighting by offsetting water polygons by epsilon
      "depthBias": 100.0,
      "slopeScaledDepthBias": 0.1,
      "depthBiasOGL": 0.5,
      "slopeScaledDepthBiasOGL": 0.5,

      "+variants": [
        { "underwater": { "+states": [ "InvertCulling", "EnableStencilTest" ] } },
        { "fog.underwater": {  } }
      ]
    },
    "terrain_water_below_stencil": {
      "vertexShader": "shaders/renderchunk.vertex",
      "vrGeometryShader": "shaders/renderchunk.geometry",
      "fragmentShader": "shaders/renderchunk.fragment",

      "+states": [
        "InvertCulling",
        "DisableDepthWrite",
        "EnableStencilTest",
        "StencilWrite",
        "DisableColorWrite"
      ],

      "+defines": [ "BYPASS_PIXEL_SHADER" ],

      "+samplerStates": [
        {
          "samplerIndex": 0,
          "textureFilter": "TexelAA"
        },
        {
          "samplerIndex": 1,
          "textureFilter": "Bilinear"
        }
      ],

      "msaaSupport": "Both",

      "textures": [
        {
          "textureIndex": 0,
          "textureLocation": "InUserPackage",
          "textureName": "atlas.terrain"
        },
        {
          "textureIndex": 1,
          "textureLocation": "Dynamic",
          "textureName": "Brightness"
        },
        {
          "textureIndex": 2,
          "textureLocation": "Dynamic",
          "textureName": "SeasonFoliage"
        }
      ],

      "vertexFields": [
        { "field": "Position" },
        { "field": "UV1" },
        { "field": "Color" },
        { "field": "UV0" }
      ],

      "frontFace": {
        "stencilFunc": "Always",
        "stencilFailOp": "Keep",
        "stencilDepthFailOp": "Keep",
        "stencilPassOp": "Replace"
      },

      "backFace": {
        "stencilFunc": "Always",
        "stencilFailOp": "Keep",
        "stencilDepthFailOp": "Keep",
        "stencilPassOp": "Replace"
      },

      "stencilRef": 2,
      "stencilReadMask": 255,
      "stencilWriteMask": 2
    },
    "terrain_doubleside:terrain_base": {
      "+states": [ "DisableCulling" ]
    },
    "terrain_alpha_single_side:terrain_base": {
      "+defines": [ "ALPHA_TEST" ],
      "+states": [ "EnableAlphaToCoverage" ]
    },
    "terrain_alpha_seasons:terrain_base": {
      "+defines": [ "ALPHA_TEST", "SEASONS" ],
      "+states": [ "DisableCulling", "EnableAlphaToCoverage" ],
      "+samplerStates": [
        {
          "samplerIndex": 0,
          "textureFilter": "TexelAA"
        },
        {
          "samplerIndex": 1,
          "textureFilter": "Bilinear"
        },
        {
          "samplerIndex": 2,
          "textureFilter": "Point"
        }
      ]

    },
    "terrain_alpha:terrain_alpha_single_side": {
      "+states": [ "DisableCulling" ],

      // z-fighting fix
      "depthBias": 100.0,
      "slopeScaledDepthBias": 0.1,
      "depthBiasOGL": 0.5,
      "slopeScaledDepthBiasOGL": 0.5
    },
    "terrain_far:terrain_base": {
      "+defines": [
        "FOG",
        "LOW_PRECISION"
      ]
    },
    "terrain_seasons_far:terrain_opaque_seasons": {
      "+defines": [
        "FOG",
        "LOW_PRECISION"
      ]
    },
    "terrain_seasons_far_alpha:terrain_opaque_seasons": {
      "+defines": [
        "FOG",
        "LOW_PRECISION",
        "SEASONS_FAR"
      ]
    },
    "terrain_inside_block": {
      "depthFunc": "LessEqual",

      "vertexShader": "shaders/position.vertex",
      "vrGeometryShader": "shaders/position.geometry",
      "fragmentShader": "shaders/current_color.fragment",
      "vertexFields": [
        { "field": "Position" }
      ],
      "msaaSupport": "Both"

    }

  }
}