I have problem with compositor.

It doesn't show result in output render until I replug Image into Composite node.

I am rendering 2 layers, but it show only first layer, without anything modified, until I unplug and plug back into Image slot in Composite node. Then it shows correctly.

NODE SETUP: enter image description here enter image description here


Result doesn't show in render output. In Viewer it is visible.


Here is the blend file. Sorry for wrong file.

  • $\begingroup$ We need to see your node setup to be able to help any $\endgroup$
    – J Sargent
    Commented Jan 30, 2015 at 12:13
  • 2
    $\begingroup$ I've had similar behavior. Rendering with F12 seems to work for me as well to 'reboot' the compositor output. I'm new here so I figure I'm missing something. Can't wait to see a good answer. $\endgroup$
    – Chuck
    Commented Jan 30, 2015 at 13:56
  • 1
    $\begingroup$ If you don't hit F12 there will be no information for the compositor to work with. $\endgroup$
    – user1853
    Commented Jan 30, 2015 at 15:02
  • $\begingroup$ uhhh. I don't understand. the composite never shows until everything is plugged in. It's like saying "this thing doesn't work when it's off". Did I misunderstand? $\endgroup$
    – ruckus
    Commented Jan 30, 2015 at 15:27
  • 1
    $\begingroup$ in the bottom of the render tab there is "Post processing" contains "compositing" option which should be checked $\endgroup$
    – Chebhou
    Commented Feb 2, 2015 at 12:52

1 Answer 1


To enable compositing go to Post processing in the Render tab of the Properties Panel and:

  • check the Compositing option
  • uncheck the Sequencer option

this will process the render result through the compositing pipeline if the compositing nodes are enabled.


  • 1
    $\begingroup$ This is an answer for an old version, but in 3.1 both Compositing and Sequencer options still exist, albeit they are now in Output tab instead of Render tab. In 3.1 there is no need to uncheck Sequencer for Compositing to work. $\endgroup$
    – mins
    Commented Apr 25, 2022 at 23:26

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