Sometimes when I draw two different pngs on top of each other the alpha is removed and I get ugly jagged edges, while drawing the pngs on the empty background draws them correctly.
Note that full alpha pixels are drawn correctly all the time, but the pixels where I have color and the alpha is less than 255 seem to be boosted up to have 255 alpha. Anyone got a clue why this happens when the pngs intersect?
Cheers
