I saw once ImageMaster when visiting an Amigan who was a professionist of video productions...
Great Stuff...
I think it was better than Image FX but with an user interface that is minor appealing than ImageFX...
I hope that someone could hire a bounty, or a major Amiga Firm like DiscreetFX could donate Mr. Williams enough amount of money to get public the sources if he still owns sourcecode.
These software should not be lost and sure require some major upgrade to acquire new features that are necessary nowadays.
