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I just don't see the difference using Facing and Fresnel, or Layer Weight as a whole in my node editor.

Is it a big difference using it, is it useful for distant objects?

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There are many big differences, among which are that:

  • Fresnel depends on the face normals of your mesh - it will not work with inconsistent or incorrect normals;
  • The Layer Weight node allows for a smooth blend between the two;

Depending on what you wish to achieve, it may be better to use a specific one, but generally, you'll want to use the Fresnel node, as it's more physically accurate.

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  • $\begingroup$ Is it effective when far away? $\endgroup$ – BinaryGreen Jan 3 '15 at 22:46
  • $\begingroup$ @BinaryGreen What, the Layer Weight? It should $\endgroup$ – someonewithpc Jan 3 '15 at 22:47
  • $\begingroup$ @someonewithpc what do you mean by 'between the two' (2nd bullet point) could you add a link? $\endgroup$ – stacker Jan 21 '15 at 21:46
  • $\begingroup$ @stacker Between the two parts of the mask. Both ways generate, basically, a mask to use for controlling mix nodes - black and white - , but layer weight blends the white and the black parts, to give a smoother transition $\endgroup$ – someonewithpc Jan 21 '15 at 22:45

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