How to delete color of cutout areas?

[rich2005]

Can you give some example of what you are are cutting out and the tools used. Color select, fuzzy select or ...what?

then which filter was this in Gimp 2.8

Quote:..This never happend in old gimp versions (which also had BW filter, like any other normal image editor)

BW filter? Desaturate or....what?

Usually the advice for a transparent area is paint in behind mode or a filled layer underneath.