Why is this anti-aliasing artefact happening?

Question

Shown below is a render of a model of mine.

enter picture description here

^{Larger version here}

As you can see in the circled portions, the anti-aliasing is pretty bad. How do I improve it?

I've tried increasing the samples per pixel and the sample width, but neither seem to help it. Is there any other way to correct it?

Here's a screenshot of the render panel: i.sstatic.net/SHZqf.png . File is here — Luke_0, Commented Jun 12, 2013 at 22:47
Changing the quality lower makes it slightly better, but it is still noticeable and the rest of the image's quality goes down. — Luke_0, Commented Jun 12, 2013 at 22:54
just saw the link, remember you can shift+b to render only a small portion ..for debugging. am checking now — zeffii, Commented Jun 12, 2013 at 23:07

zeffii · Accepted Answer · 2013-06-12 23:24:53Z

5

Looks like you have transparency on the Island material, switching it off seems to do the trick,

enter image description here

answered Jun 12, 2013 at 23:14

zeffii

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$\begingroup$ This works. I'm not sure how the transparency got turned on. $\endgroup$
– Luke_0
Commented Jun 12, 2013 at 23:21
1

$\begingroup$ cool! sometimes accidental keystrokes.. who knows. $\endgroup$
– zeffii
Commented Jun 12, 2013 at 23:26

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