Definitions for "Alpha Blending"
Process which allows to check the transparency of a pixel in comparison to that just under it making it opaque or transparent in a changing way. It is used for example for fog effects or explosion.
Additional information for each pixel for creating transparent materials.
The term used where a value (called 'Alpha') is used to indicate a transparency value for a pixel. If the Alpha=maximum then the pixel is opaque, that is the full colour of the pixel is written to the destination. If Alpha=0 then the pixel is fully transparent, and the destination is left unaltered. Values in-between cause 'blending' with the formula Destination = Source*Alpha/max_Alpha + Destination*(max_Alpha-Alpha)/max_Alpha
Overlaying one image on another so that some of the underlying image may or may not be visible. See also key.