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When I combine two shapes where at least one has a non-right angle or curve, both shapes become anti-aliased. This appears to be some new to CS6. Are there any ways to get around this? The photo below shows two sets of combined shapes, one with a 45 degree angle which causes the blurring and one with right angles which does not blur.!

Example of Blurring

enter image description here

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2 Answers 2

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Photoshop will always anti-alias shapes, which in most situations is what you want. When designing icons and other small-scale items, quite often that's not what you want.

One way to avoid the problem is to change your workflow slightly. Create and combine paths, rather than shape layers, then stroke and fill the paths.

  • For strokes, use the Pencil tool and "Stroke Path" from the Paths flyout menu.

  • For fills, use "Fill Path" and turn off Anti-Alias.

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By recreating the exact same shape from a single path the anti-aliasing did not occur. Thanks! –  hereswhatidid Jul 1 '13 at 20:48

Actually all those paths are anti-aliased, the top image and the bottom image. If you look closely you can see the subtle grey line for anti-aliasing.

The difference is an arc or angle will always require more anti-aliasing than a straight path.

To assist you can tick the "align edges" option which appears on the Control bar when a Shape Tool is active.

For more tips on adjusting anti-aliasing, please see the following similar threads:

How do I turn off anti-aliasing while drawing shapes in Photoshop?

http://superuser.com/questions/375493/can-i-disable-anti-aliasing-in-photoshop

How can I stop anti-alias / feathering within Photoshop?

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The lower shape doesn't have any blurred out edges like the top. I don't recall this happening in earlier versions which is why I ask –  hereswhatidid Jun 27 '13 at 18:24
    
My overall point was, you can't have an arc or angle without anti-aliasing. You need to use the pencil tool and be precise if you do not want any anti-aliasing. The threads I linked to should be enlightening. The vertical in your top image probably shifted a fraction of a point when you combined shapes, causing the anti-aliased vertical edge. –  Scott Jun 27 '13 at 19:01

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