are you using image.fill() and getting the content of the circle transparent and the rest opaque, Colin ??
Yes, if I stick the image into a bitmap cast member, there's no thumbnail, but the paint window has the circle. If I select all and fill with one color in the paint window, the thumbnail shows the fill color in just the corners. It's an inverse of the alpha I was expecting.
as if you have a white circle on black background as a alpha mask for that bitmap, right ?
and the question is what caused the alphachannel to be of that shape ?
or did you get this alphachannel by filling the bitmaps image with image.fill()
if you use draw() or fill() on 32 bit image objects, with alphachannel, it will affect the alphachannel at the same time, unlike copyPixels, which doesn't change the alphachannel of the target image.
so perhaps you have changed the alphachannel of the target image earlier with draw() or copyPixels() ?
although I have no clue, why it would draw an 'inverted' circle mask into the alphachannel...?
which boils down to: is there really something like 'alphainvert'
(and why didn't I find it myself... ;-)
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