AddLight 2

Addlight version 2
Addlight 2 allows you to assemble or compose many frames or sequences of frames.
More than 30 operators are available : overlay, add, subtract, gamma, multiply, RGB balance...
Addlight works in 32 bit mode, you can manipulate the alpha channel for transparency.
AddLight 2 supports BMP 24 or 32 bit, TGA 32bits and JPEG 24 bit format.

Interface screenshot
AddLight 2 User's guide