Theoretical question

miked · Post by **miked** » Tue Apr 12, 2011 4:26 am

Can anyone think of a way that a rectangular, non-shape, non-background layer (in other words a normal artlayer) could be translated so that the perimeter pixel opacity on any side is anything other than 100%? I know you can generate translucent pixels by resizing a layer, but can you do so by translating?

Or how about this: is it possible to

1. select all and copy a flattened image, and
2. paste the image into a second, larger document

in such a way that the perimeter pixels would not be 100% opacity?

...Mike

Mike Hale · Post by **Mike Hale** » Tue Apr 12, 2011 2:59 pm

A picture is worth a thousand works and this might need a screen shot as I am not sure what you are asking.

If you translate( move ) a layer all pixels that are not 0% opacity are moved. So if the layer has translucent edge pixels they get moved along with the 100% pixels. If you move the layer so that an edge is beyond the document bounds the translucent may not show for that edge but they are still in the layer.

miked · Post by **miked** » Tue Apr 12, 2011 10:33 pm

For discussion purposes, lets assume that we have a 10px x 10px document. The background layer is white. A layer called "square" consists of a 4x4 black square in the middle of the white area. Each of the 16 pixels that make up this black area are 100% black and 100% opaque.

The question is: is there a way to shift the Square layer using the translate() function so that sub-pixel rendering is put into effect? So that, instead of each of Square's 16 pixels being 100% opaque, the perimeter pixels are translucent?

In other words, using only translate(), is it possible to turn this

into this

...Mike

pfaffenbichler · Post by **pfaffenbichler** » Fri Apr 15, 2011 7:27 am

I think just recently there was another thread where it was stated that translate does round to full pixels, so I think you cannot do it with translate.