Material Constants

Side

THREE.FrontSide
THREE.BackSide
THREE.DoubleSide

Shading

THREE.FlatShading
THREE.SmoothShading

Colors

THREE.NoColors
THREE.FaceColors
THREE.VertexColors

Blending Mode

THREE.NoBlending
THREE.NormalBlending
THREE.AdditiveBlending
THREE.SubtractiveBlending
THREE.MultiplyBlending
THREE.CustomBlending

Source

[link:https://github.com/mrdoob/three.js/blob/master/src/Three.js src/Three.js]