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I'm still a beginner in blender. But I have a question for the rendering options. After rendering a image there is a option to view different layers. One is the View Layer. Another one is the Composite. I don't really understand what these two layers are doing. Can someone explain this to me?

Layers

Also why is my Denoise node not removing noise?

@Duarte Farrajota Ramos ♦ has said

Composite is the final result of rendering with all its node, which may include the result of rendering several distinct View Layers. The other listed View Layer will display the result of each individual view layer you have setup in you scene. In this case since you don't seem to have created any custom View Layers it displays only one View Layer which is the default one

But I have a denoise node. But View Layer has no noise. But the Composite has noise in the image. If Composite has rendered all nodes. Why does it has noise? And why does View Layer has no noise? I have uploaded my blend file to pasteall.org the link is in the comments.

Composite: Composite layer

View Layer: View layer

If you zoom in you can see the difference.

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  • $\begingroup$ Composite is the final result of rendering with all its node, which may include the result of rendering several distinct View Layers. The other listed View Layer will display the result of each individual view layer you have setup in you scene. In this case since you don't seem to have created any custom View Layers it displays only one View Layer which is the default one $\endgroup$
    – Duarte Farrajota Ramos ♦
    Apr 27, 2022 at 9:50
  • $\begingroup$ @DuarteFarrajotaRamos so I have a denoise node. But I'm really confused. The View Layer has no noise. But the Composite has noise in the image. If Composite has rendered all nodes. Why does it has noise? And why does View Layer has no noise? $\endgroup$
    – Benny
    Apr 27, 2022 at 10:13
  • $\begingroup$ Impossible to say without looking at your setup $\endgroup$
    – Duarte Farrajota Ramos ♦
    Apr 27, 2022 at 10:22
  • $\begingroup$ Here is the blend file: pasteall.org/media/9/9/9963dfb33143503fcd3dcd6e5e875dda.blend $\endgroup$
    – Benny
    Apr 27, 2022 at 10:34
  • $\begingroup$ I'm sorry, but I just rendered your file and I honestly can't see the difference between the View Layer combined output and the composite output. Are you sure you're seeing one? $\endgroup$
    – Marty Fouts
    Apr 27, 2022 at 17:19

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This peculiarity comes about because you have also activated OpenImageDenoise in the Render Properties.

enter image description here

The result already denoised by OpenImageDenoise is displayed in the View Layer. In your composite nodes, however, you use the original Noisy Image and denoise it with the node Denoise in the Compositing Nodetree, which is output in the Composite output.

Since you have also selected the option Fast, the result is correspondingly worse than the image denoised by OpenImageDenoise visible in View Layers.

If you instead turn off Denoise in the Render Properties and select Accurate in the Denoise node, the result will only be denoised by the Denoise node and it will look as you expect: View Layer is not denoised, but Composite output is, with accurate prefiltering by the node Denoise.

enter image description here

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