[Bf-committers] Multi Layer EXR issues

Lukas Tönne lukas.toenne at googlemail.com
Fri May 18 11:42:24 CEST 2012

I'm sorry this turned out so chaotic (small changes causing a wave of
other problems over the release period).

Had some discussion on IRC on how to handle multilayer passes in the
image node. In general the render layer/render pass separation from
Blender's render output is meaningless in image files (it just
translates to a "render_layer.render_pass" naming scheme), so it would
be preferable to have image layer names flattened instead of trying to
force generic image layers into the Blender naming scheme. However, as
your example demonstrates, showing all the existing image layers at
once is not a viable option ...

Other programs solves this by allowing a selection of each individual
image layer (as opposed to the render layer groups in Blender), which
is a more general solution than what the image node does. But until we
have a good UI for this kind of thing (e.g. right-click menu +
scrolling on nodes) it's probably best to revert to the previous
behavior (done in r46542).

About the messed up image passes: In my tests after the r46542 commit
it seems to work correctly (generating EXR file with several passes in
2.62 and loading as image node trunk). Could you please test this with
your own files and if it still doesn't work maybe provide an example?

On Thu, May 17, 2012 at 12:37 PM, Bartek Skorupa
<bartekskorupa at bartekskorupa.com> wrote:
> Sorry, in r46714 - no RenderLayers show up. All passes from all render
> layers grouped together.
> This is how my "Input Image" node looks like:
> http://www.pasteall.org/pic/31959
> Bartek Skorupa
> www.bartekskorupa.com
> On 2012-05-17, at 12:27, Bartek Skorupa wrote:
>> Issue:
>> In official Blender 2.63a:
>> Opened MultiLayerEXR created in blender 2.62 and passes are
>> completely messed up.
>> Color pass from one render layer shows AO from another render layer.
>> AO pass outputs Normal Pass from different layer etc.
>> I tried to re-render Multilayer file (blend created in 2.62) and it
>> gave me different results, but messed up as well.
>> Tried the same in build of today: r46714. Same results.
>> Bartek Skorupa
>> www.bartekskorupa.com
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