## E

emissive property
  The material property that determines whether a material emits light. The emissive property of a material is one of two properties that determines how the material reflects light. See also specular property.
emissive setting
  See emissive property.
enable frame
  The frame to which a light applies.
envelope
  A set of values that defines the shape of a force feedback effect by modifying the magnitude at the beginning (attack) and end (fade).
even field
  The second field comprising a video frame in an odd/even field set. Also known as field 2.
execute buffer
  A fully self-contained, independent packet of information that describes a 3-D scene. An execute buffer contains a vertex list followed by an instruction stream. The instruction stream consists of operation codes, or opcodes, and the data that is operated on by those opcodes.