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three.js
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		<h1>Material Constants</h1>

		<p class="desc">
		These constants define properties common to all material types,
		with the exception of Texture Combine Operations which only apply to [page:MeshBasicMaterial.combine MeshBasicMaterial], [page:MeshLambertMaterial.combine MeshLambertMaterial] and [page:MeshPhongMaterial.combine MeshPhongMaterial].<br />
		</p>


		<h2>Side</h2>
		<code>
		THREE.FrontSide
		THREE.BackSide
		THREE.DoubleSide
		</code>
		<p>
		Defines which side of faces will be rendered - front, back or both.
		Default is [page:Constant FrontSide].
		</p>

		<h2>Blending Mode</h2>
		<code>
		THREE.NoBlending
		THREE.NormalBlending
		THREE.AdditiveBlending
		THREE.SubtractiveBlending
		THREE.MultiplyBlending
		THREE.CustomBlending
		</code>


		<p>
		These control the source and destination blending equations for the material's RGB and Alpha sent to the WebGLRenderer for use by WebGL.<br />
		[page:Constant NormalBlending] is the default.<br />
		Note that [page:Constant CustomBlending] must be set to use [page:CustomBlendingEquation Custom Blending Equations].<br />
		See the [example:webgl_materials_blending materials / blending] example.<br />
		</p>

		<h2>Depth Mode</h2>
		<code>
		THREE.NeverDepth
		THREE.AlwaysDepth
		THREE.EqualDepth
		THREE.LessDepth
		THREE.LessEqualDepth
		THREE.GreaterEqualDepth
		THREE.GreaterDepth
		THREE.NotEqualDepth
		</code>
		<p>
		Which depth function the material uses to compare incoming pixels Z-depth against the current Z-depth buffer value. If the result of the comparison is true, the pixel will be drawn.<br />
		[page:Materials NeverDepth] will never return true.<br />
		[page:Materials AlwaysDepth] will always return true.<br />
		[page:Materials EqualDepth] will return true if the incoming pixel Z-depth is equal to the current buffer Z-depth.<br />
		[page:Materials LessDepth] will return true if the incoming pixel Z-depth is less than the current buffer Z-depth.<br />
		[page:Materials LessEqualDepth] is the default and will return true if the incoming pixel Z-depth is less than or equal to the current buffer Z-depth.<br />
		[page:Materials GreaterEqualDepth] will return true if the incoming pixel Z-depth is greater than or equal to the current buffer Z-depth.<br />
		[page:Materials GreaterDepth] will return true if the incoming pixel Z-depth is greater than the current buffer Z-depth.<br />
		[page:Materials NotEqualDepth] will return true if the incoming pixel Z-depth is not equal to the current buffer Z-depth.<br />
		</p>

		<h2>Texture Combine Operations</h2>
		<code>
		THREE.MultiplyOperation
		THREE.MixOperation
		THREE.AddOperation
		</code>
		<p>
		These define how the result of the surface's color is combined with the environment map (if present), for [page:MeshBasicMaterial.combine MeshBasicMaterial], [page:MeshLambertMaterial.combine MeshLambertMaterial] and [page:MeshPhongMaterial.combine MeshPhongMaterial]. <br />
		[page:Constant MultiplyOperation] is the default and multiplies the environment map color with the surface color.<br />
		[page:Constant MixOperation] uses reflectivity to blend between the two colors.<br />
		[page:Constant AddOperation] adds the two colors.
		</p>

		<h2>Stencil Functions</h2>
		<code>
		THREE.NeverStencilFunc
		THREE.LessStencilFunc
		THREE.EqualStencilFunc
		THREE.LessEqualStencilFunc
		THREE.GreaterStencilFunc
		THREE.NotEqualStencilFunc
		THREE.GreaterEqualStencilFunc
		THREE.AlwaysStencilFunc
		</code>
		<p>
		Which stencil function the material uses to determine whether or not to perform a stencil operation.<br />
		[page:Materials NeverStencilFunc] will never return true.<br />
		[page:Materials LessStencilFunc] will return true if the stencil reference value is less than the current stencil value.<br />
		[page:Materials EqualStencilFunc] will return true if the stencil reference value is equal to the current stencil value.<br />
		[page:Materials LessEqualStencilFunc] will return true if the stencil reference value is less than or equal to the current stencil value.<br />
		[page:Materials GreaterStencilFunc] will return true if the stencil reference value is greater than the current stencil value.<br />
		[page:Materials NotEqualStencilFunc] will return true if the stencil reference value is not equal to the current stencil value.<br />
		[page:Materials GreaterEqualStencilFunc] will return true if the stencil reference value is greater than or equal to the current stencil value.<br />
		[page:Materials AlwaysStencilFunc] will always return true.<br />
		</p>

		<h2>Stencil Operations</h2>
		<code>
		THREE.ZeroStencilOp
		THREE.KeepStencilOp
		THREE.ReplaceStencilOp
		THREE.IncrementStencilOp
		THREE.DecrementStencilOp
		THREE.IncrementWrapStencilOp
		THREE.DecrementWrapStencilOp
		THREE.InvertStencilOp
		</code>
		<p>
		Which stencil operation the material will perform on the stencil buffer pixel if the provided stencil function passes.<br />
		[page:Materials ZeroStencilOp] will set the stencil value to 0.<br />
		[page:Materials KeepStencilOp] will not change the current stencil value.<br />
		[page:Materials ReplaceStencilOp] will replace the stencil value with the specified stencil reference value.<br />
		[page:Materials IncrementStencilOp] will increment the current stencil value by `1`.<br />
		[page:Materials DecrementStencilOp] will decrement the current stencil value by `1`.<br />
		[page:Materials IncrementWrapStencilOp] will increment the current stencil value by `1`. If the value increments past `255` it will be set to `0`.<br />
		[page:Materials DecrementWrapStencilOp] will increment the current stencil value by `1`. If the value decrements below `0` it will be set to `255`.<br />
		[page:Materials InvertStencilOp] will perform a bitwise inversion of the current stencil value.<br />
		</p>

		<h2>Normal map type</h2>
		<code>
		THREE.TangentSpaceNormalMap
		THREE.ObjectSpaceNormalMap
		</code>
		<p>
		Defines the type of the normal map. 
		For TangentSpaceNormalMap, the information is relative to the underlying surface. 
		For ObjectSpaceNormalMap, the information is relative to the object orientation.
		Default is [page:Constant TangentSpaceNormalMap].
		</p>

		<h2>GLSL Version</h2>
		<code>
		THREE.GLSL1
		THREE.GLSL3
		</code>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]
		</p>
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