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I am trying to get Z Pass to render but all I get is a white image. Any ideas why that happens?

I tried setting up the render layers, checked only z-pass since that's all I need but still can't get it going. I am having a similar issue when trying to output to PNG's other passes but they do show up however at least in the viewer.

Also I tried looking up for tuts on this but what I found is only for internal compositor unfortunately.

Thanks

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marked as duplicate by gandalf3, CharlesL, hjaarnio, Maccesch, iKlsR Nov 25 '13 at 15:16

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  • $\begingroup$ AFAIK the compositor is the same regardless of the render engine used. What do you mean by "only for internal compositor"? $\endgroup$ – gandalf3 Nov 23 '13 at 21:01
  • $\begingroup$ I mean they are for the blender compositor not others such as after effects, nuke which are external. $\endgroup$ – 00Ghz Nov 23 '13 at 21:46
  • $\begingroup$ Oh. sorry, I misunderstood. Does the solution here work for you? $\endgroup$ – gandalf3 Nov 23 '13 at 22:42
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    $\begingroup$ If you really want to output Z pass, you may consider to use other format that can store Z-buffer data, like OpenEXR. I don't think a real Z-buffer can be kind of visible data, though can be shown in UV/Image Editor. $\endgroup$ – Leon Cheung Nov 24 '13 at 8:27

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