Originally Posted by jsr
If by preserving you mean it is stored into the ILBM as it was, then the answer is of course no, since the ILBM does not support alpha.
But as you know ILBM is just one of many possible chunks in an IFF file. You could (trying to get really creative here
) just create a new chunk with the alpha channel!!
And save it into the very same file! Nobody gets harmed, everybody ignores what is unknown....
What was the question again?