SetLoop v1.2

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Contributor: Max van Leeuwen
Loop nodes - an iterator/for each loop/solver for Nuke
11.0, 10.5, 10.0, 9.0, 8.0, 7.1, 7.0, 6.3, 6.2, 6. or later
Linux, Mac, Windows
03 Sep 2017


(Examples of a Mandelbrot set render, and Reaction Diffusion - made using SetLoop)


SetLoop is a toolset for Nuke that can loop a set of nodes a specific amount of times (like a for each loop, an iterator or a solver).
It basically copies the nodes you place between Loop_Begin and Loop_End inside Loop_End (a group), and reconnects them.

But there are many more features to it which, combined, make this an actually functional image solver that can render fractals and reaction diffusion entirely inside Nuke.


Node graphNode properties


SetLoop can be used, for example, to render a Mandelbrot Set or create Reaction Diffusion. Go to for downloadable examples!




  • relink external inputs
    if nodes in the loop are connected to nodes outside the loop, this will make sure they are relinked automatically by adding exra inputs to Loop_End to which the nodes connect
    (this is enabled by default, as it does not change anything if no external inputs are present)
  • relink external expressions
    for all expressions referencing nodes which are not part of the loop, this will make sure to add 'parent.' before every nodename and replace 'parent.' with 'root.' for every node not being looped - this way, they'll still be connected from inside the group
    (this is disabled by default, as it could mess up expressions if user variables have the same name as nodes)
  • add loop count knob
    the nodes inside the loop will get an index count knob ('loopcount' (int)) which can be used to create different values or random seeds for each loop iteration - the original nodes (the ones in the backdrop in the main graph) will also get this knob, with index 0
    (this is disabled by default, as it interferes with all nodes in the loop)
  • offset
    offset the loop count knob
    (0 by default)
    - only available when 'add loop count knob' is enabled

  • loops
    amount of loops to create
  • method
    'sequential' loops like an iterator, 'parallel' creates multiple instances of the same input and merges them together
    when using 'parallel', make sure to add a random value to an expression or to use the 'add loop count knob' for visible results
    ('sequential' is the default, as this is a more commonly used loop)
  • set
    bake/clear the loop

  • scroll
    animate the loop level
  • invert
    invert the direction of the scroll
    - only available with method 'parallel'
  • blend
    blends the loop levels when scroll is not a round number
  • spread
    feather the loop levels
    - only available with method 'parallel' and 'blend' enabled

  • stats
    current stats

  • [tab] constants
    room for user knobs that can be referenced to from inside the loop
    (e.g.: 'constant_float')
  • constant_float
    this does nothing - it can be referenced to using 'constant_float'
    or removed, if you don't like it



Please send suggestions, bug reports, and other feedback! And I'd love to know if you created something cool with this :)




Added new method for looping ('parallel'), fixed compatibility with Nuke 11 (pyside2), added stats


Fixed a bug, cleaned UI, better tooltips

Please login in order to download these files.


+1 # Adrian Pueyo 2017-07-22 21:52
This is great! Thanks for sharing
# Max van Leeuwen 2017-08-01 12:08
Thanks! Glad you like it :)
+1 # Sven Akelian 2017-10-09 10:19
How could I miss that one!

Amazing idea and pretty reactive ( see what I did there ;) )

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