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True Opacity
Hi guys,
I have duplicated a layer in z space quite a few times and i’ve got a slider on another layer controlling its opacity (all the duplicated layers). The problem is the opacity doesnt seem to be real opacity. It seems one layer is affecting/influencing another layer and thus you get decreasing brightness rather than opacity. Is there any way to compensate for this?
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3 Replies
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Can you post an example and/or better describe how you think it should look vs. how it actually looks? It’s hard to visualize how opacity could be anything other than “real” opacity.
Dan
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I’ve got a shape layer that is duplicated about 20 times in z-space. I’ve linked each of the layer’s opacity to a master slider to control overall opacity. If its done this way, you cannot see the bottom layer (suppose an image) until the opacity is very low, around 5%. I’m thinking its beacuse one layer’s opacity is affecting the other and hence you get a graying effect rather than a true opaque effect.
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I think that’s just how opacity works. If I remeber correctly, the formula for stacked opacity is something like:
100*(1 – (1-Opat1/100)*(1-Opat2/100)…)
So if you have 20 stacked layers, each at 20% opacity, you’d expect the opacity of the stack to be about 99%, making layers at the bottom of the stack barely visible.
If you reduce the opacity to 5% the opacity of a 20-layer stack would be about 36%. My math might be off a little, but I think thats the general idea.
Dan
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