Every route to a layer began with a selection — a gradient, a band, a subject,
a category — and painting was reachable only by making one of those and
joining a painted part to it. So the answer to "brush a correction onto this
corner of the sky" was "add a radial gradient you do not want, then paint into
that", which is not an answer.
Paint sits beside Linear and Radial and makes a layer whose base is a brush.
It covers nothing until a stroke lands in it, so pressing it arms the brush
and shows the mask as well: a row that appeared and changed no pixel, with the
pointer still in "select", is indistinguishable from a button that did nothing.
dtourolle
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