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I'm having trouble telling which direction each face is facing, is there any easy way of changing the default face colors to something else than light grey/slightly darker grey? or are there any other easy ways of telling when a face is pointing the wrong way?

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There are two much easier things you can do to visualize the direction that faces are pointing than change the user preferences.

The first is activating the normals.

enter image description here

Now every face will have a blue line pointing in the direction it is pointing.

The other thing you can do is enable Backface Culling.

enter image description here

Here I have added some loop cuts so that there are more faces to see.

If one is inverted, and pointing inward, you will also see through it. this is good for working in the BGE where faces pointing inward will make your mesh look really weird.

enter image description here

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  • $\begingroup$ Who beat who? o.O $\endgroup$ – VRM May 13 '15 at 20:09
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    $\begingroup$ we were within a few second of each other, But I had more to mine when I posted it, so I'd say I win :-) $\endgroup$ – X-27 is done with the network May 13 '15 at 20:10
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You can try turning on Backface Culling in the N menu. This will show only the wireframe for all reversed normal faces without a properly facing face behind them.

enter image description here

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  • $\begingroup$ I started my answer first! No fair! (Life isn't fair) $\endgroup$ – X-27 is done with the network May 13 '15 at 20:10
  • $\begingroup$ I started my backface culling part first :P $\endgroup$ – VRM May 13 '15 at 20:10
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    $\begingroup$ If I could accept both answers I most definitely would...! Many many thanks! $\endgroup$ – Werner May 13 '15 at 20:15

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