ShaderLab: Blending

Syntax

Blend Off: Turn off blending (this is the default)
Blend SrcFactor DstFactor: Configure and enable blending. The generated color is multiplied by the SrcFactor. The color already on screen is multiplied by DstFactor and the two are added together.
Blend SrcFactor DstFactor, SrcFactorA DstFactorA: Same as above, but use different factors for blending the alpha channel.
BlendOp Op: Instead of adding blended colors together, carry out a different operation on them.
BlendOp OpColor, OpAlpha: Same as above, but use different blend operation for color (RGB) and alpha (A) channels.
AlphaToMask On: Turns on alpha-to-coverage. When MSAA is used, alpha-to-coverage modifies multisample coverage mask proportionally to the pixel Shader result alpha value. This is typically used for less aliased outlines than regular alpha test; useful for vegetation and other alpha-tested Shaders.