Amiga ilbms images must be stored as an even number of bytes in width.
However, the ilbm bmhd field w (width) should describe the actual image
width, not the rounded up width as stored.

ilbms created with electronic arts ibm or amiga deluxe paint ii packages
are compatible (though you may have to use a `.lbm' filename extension on
an IBM).  The ILBM graphic files may be transferred between the machines
(or between the Amiga and IBM sides your Amiga if you have a CBM
Bridgeboard card installed) and loaded into either package.