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Disable soft edges.
I need to disable (edge blending?) I don’t know if thats the right term?
The problem is these layers appear to have gaps between them from some angles, where as when viewed from the front all the edges are alligned very precisly each row of pixels adjoined perfectly to the next.
How can I stop these white lines from appearing between each layer?
I realise that the solution may result in very pixeled looking edges, but this time I really do need that or these layers won’t appear to be joined as precisly as they actually are.
Is there some kind of function that I can disable (preferably on selected layers)?
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3 Replies
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If I’m interpreting your screenshot and message right…
Try setting the blending mode to Alpha Add for these layers.
When the edges of a layer are anti-aliased, there’s some partial transparency at the edges. When two areas of 50% transparency overlap, the result is not 100% opacity but 75% opacity, because the default operation is multiplication. (50% of the light gets through one layer, and then 50% of _that_ gets through the next layer, so 25% gets through the system.) This is just like partial transparency in the real world.
But, you don’t want this default blending. You want the two 50% opacity areas to combine to make a seamless, opaque join. You want the alpha values to be added. Hence Alpha Add.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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I thought it was antialiasing, though I don’t really want the edges of the layers to overlap, it makes the fact that they are all seperate layers too obvious.
I’ve had some success switching the layer quality to “draft” this make all the edges meet up purfectly but, degrades the picture quality severly, I’m probably going to have to use a combination of the two layer qualities “doubled” over one another – sandwidged together with the higher quality layer on top. It’s going to mean twice the work and there are something like 40 layer on this image allready
The Y rotation of the layers are linked, they will be keyframed with trapcode soundkeys used to animate the width of each layer, making the image “Pulse” as it morphes in to this shape.
lot’s of work double the work if I have to use two sandwidched layers for each plain:(
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The ‘Alpha Add’ blend mode is great for this, but only if the composition you’re working in is empty behind the 3D layers. As soon as any layer passes behind the problematic edges AE will blend the background layer into the anti-aliased edges. A real pain.
My solutions have always involved either Matte > Simple Choker with a negative value (expanding the edges slightly) or Channel > Minimax with a maximum operation on the alpha (also expands the edges, but only in 1 pixel increments).
Darby Edelen
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