What does Fac in the Mix tab stand for (in the golden tab Mix below ) ? I cannot find it in the Manual.

enter image description here

  • 2
    $\begingroup$ "Controls the amount of influence the node exerts on the output image." - from: docs.blender.org/manual/en/latest/render/shader_nodes/color/… $\endgroup$
    – brockmann
    Jun 18, 2020 at 17:45
  • 3
    $\begingroup$ You mean mix factor? $\endgroup$ Jun 18, 2020 at 17:49
  • $\begingroup$ Why are you using vector curves for black and white information like a mask? $\endgroup$
    – susu
    Jun 18, 2020 at 18:09
  • $\begingroup$ @susu I'm just experimenttig to see what I get with vector curves. $\endgroup$ Jun 18, 2020 at 18:12
  • 1
    $\begingroup$ @user2925716 please, ask new questions on a different post! not as comments. $\endgroup$
    – susu
    Jun 19, 2020 at 15:19

1 Answer 1


Fac. is short for Factor

Nodes that have such input can use scalar information, or a grayscale image, as values to control the mix between two different elements.


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