2013 HELP: Mesh detail, hexagons, circles, and LOD settings

Mesh detail, hexagons, circles, and LOD settings
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Ever seen circles like this?

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I have seen an increase in queries about this problem recently, so I am posting on it.
Mesh Detail
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Want them like this?

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Here's how to fix them.
on Viewer 3.6 
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Preferences, Graphics tab
Advanced

• Me (Top left)
• Preferences
• Graphics
• Mesh detail, set high

It says mesh, but don't believe it.  The low mesh detail setting will also turn regular circular prims into hexagons. It probably also affects sculpties.  
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If you are using another viewer, or if this does not fix sculptie borks, the instructions in the link below may work for you.
Debugged your Level-Of-Detail?
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For more information on LOD see this link:
Understanding: LOD
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