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I am unsure what this red line linking the input and output of the node signifies in the below image. Can anyone tell me what it is?

enter image description here

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That means the node is muted and isn't taking any part in calculations. To unmute it, select the node and press M

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  • $\begingroup$ Thank you! I knew it'd be something simple - learn something new with Blender everyday! $\endgroup$ – Starfury359 Feb 25 '17 at 13:14
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    $\begingroup$ It provides more information than "this node is muted": it says "this node is muted, and instead the value of the second input is being passed through." $\endgroup$ – wchargin Feb 25 '17 at 16:22
  • $\begingroup$ Awesome, did not know we could mute and unmute! $\endgroup$ – Cyberchipz Mar 1 '17 at 20:43

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