Is it not expected that the Sprite in the attached composition would "disappear", when the Constant Color patch is set to pure Alpha black, and the blend mode is in Over? Also, it seems as though it should look "black" if I was to place the blend mode to "Over", but this returns no image output from the Constant Color.
In short, if the color value of the Constant Color is set to 0,0,0,0, it no longer outputs an image; it shuts down. This test is in Snow Leopard, 10.6.1. It would be great to know if this is happening to others, or if anyone has ran into this. I can see an argument for this behavior, but I don't believe it to be correct for a wide range of usage scenarios. Changing the actual color of the Sprite to reflect the same color values results in expected behavior (translucent black at 0,0,0,0.1, and "nothing" at 0,0,0,0). -George Toledo
Constant Color Returns No Image When Alpha Value Is 0.qtz
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