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].
		
		THREE.FrontSide
		THREE.BackSide
		THREE.DoubleSide
		
		Defines which side of faces will be rendered - front, back or both. Default is [page:Constant FrontSide].
		THREE.NoColors
		THREE.FaceColors
		THREE.VertexColors
		
		
		[page:Constant NoColors] is the default and applies the material's color to all faces.
		[page:Constant FaceColors] colors faces according to each [page:Face3 Face3] [page:Color Color] value.
		[page:Constant VertexColors] colors faces according to each [page:Face3 Face3] vertexColors value. This is an array of three [page:Color Color]s, one for each vertex in the face.
		See the [example:webgl_geometry_colors geometry / colors] example.
		
		THREE.NoBlending
		THREE.NormalBlending
		THREE.AdditiveBlending
		THREE.SubtractiveBlending
		THREE.MultiplyBlending
		THREE.CustomBlending
		
		
		These control the source and destination blending equations for the material's RGB and Alpha sent to the WebGLRenderer for use by WebGL.
		[page:Constant NormalBlending] is the default.
		Note that [page:Constant CustomBlending] must be set to use [page:CustomBlendingEquation Custom Blending Equations].
		See the [example:webgl_materials_blending materials / blending] example.
		
		THREE.NeverDepth
		THREE.AlwaysDepth
		THREE.LessDepth
		THREE.LessEqualDepth
		THREE.GreaterEqualDepth
		THREE.GreaterDepth
		THREE.NotEqualDepth
		
		
		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.
		[page:Materials NeverDepth] will never return true.
		[page:Materials AlwaysDepth] will always return true.
		[page:Materials LessDepth] will return true if the incoming pixel Z-depth is less than the current buffer Z-depth.
		[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.
		[page:Materials GreaterEqualDepth] will return true if the incoming pixel Z-depth is greater than or equal to the current buffer Z-depth.
		[page:Materials GreaterDepth] will return true if the incoming pixel Z-depth is greater than the current buffer Z-depth.
		[page:Materials NotEqualDepth] will return true if the incoming pixel Z-depth is not equal to the current buffer Z-depth.
		
		THREE.MultiplyOperation
		THREE.MixOperation
		THREE.AddOperation
		
		
		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]. 
		[page:Constant MultiplyOperation] is the default and multiplies the environment map color with the surface color.
		[page:Constant MixOperation] uses reflectivity to blend between the two colors.
		[page:Constant AddOperation] adds the two colors.
		
		THREE.NeverStencilFunc
		THREE.LessStencilFunc
		THREE.EqualStencilFunc
		THREE.LessEqualStencilFunc
		THREE.GreaterStencilFunc
		THREE.NotEqualStencilFunc
		THREE.GreaterEqualStencilFunc
		THREE.AlwaysStencilFunc
		
		
		Which stencil function the material uses to determine whether or not to perform a stencil operation.
		[page:Materials NeverStencilFunc] will never return true.
		[page:Materials LessStencilFunc] will return true if the stencil reference value is less than the current stencil value.
		[page:Materials EqualStencilFunc] will return true if the stencil reference value is equal to the current stencil value.
		[page:Materials LessEqualStencilFunc] will return true if the stencil reference value is less than or equal to the current stencil value.
		[page:Materials GreaterStencilFunc] will return true if the stencil reference value is greater than the current stencil value.
		[page:Materials NotEqualStencilFunc] will return true if the stencil reference value is not equal to the current stencil value.
		[page:Materials GreaterEqualStencilFunc] will return true if the stencil reference value is greater than or equal to the current stencil value.
		[page:Materials AlwaysStencilFunc] will always return true.
		
		THREE.ZeroStencilOp
		THREE.KeepStencilOp
		THREE.ReplaceStencilOp
		THREE.IncrementStencilOp
		THREE.DecrementStencilOp
		THREE.IncrementWrapStencilOp
		THREE.DecrementWrapStencilOp
		THREE.InvertStencilOp
		
		
		Which stencil operation the material will perform on the stencil buffer pixel if the provided stencil function passes.
		[page:Materials ZeroStencilOp] will set the stencil value to 0.
		[page:Materials KeepStencilOp] will not change the current stencil value.
		[page:Materials ReplaceStencilOp] will replace the stencil value with the specified stencil reference value.
		[page:Materials IncrementStencilOp] will increment the current stencil value by 1.
		[page:Materials DecrementStencilOp] will decrement the current stencil value by 1.
		[page:Materials IncrementWrapStencilOp] will increment the current stencil value by 1. If the value increments past 255 it will be set to 0.
		[page:Materials DecrementWrapStencilOp] will increment the current stencil value by 1. If the value decrements below 0 it will be set to 255.
		[page:Materials InvertStencilOp] will perform a bitwise iversion of the current stencil value.
		
[link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]