[Bf-funboard] Multilayer rebuild - corrected

[Kovacs Peter G.]

Sorry for my last post, a had some problem with 
word warping,so  again and excuse me:


Hi all,

I am working on many projects with Blender. We built 
up a good pipeline around it, we have some scripts 
to make it more usable, and so on. I have faced 
with a strange problem around the multilayer 
OpenEXR file handling. If I am rendering scene in 
our current projects with 4 layers and around 20 
passes I've got a big EXR file, and I can use it 
many ways. It's a good deal. I put it as an input 
node into the Blender's Node Editor, and everything
is fine. But If I need to change a layer or some
passes, I re-render it on our farm, and after than 
I put the results again into the Node Editor, and 
everything goes on its right way. But we are storing 
in a 1000 frame sequence est. 37 200 Mb useless data, 
and I can't re-build with the corrected passes or 
layers the original multilayer image sequence. 
Therefore if it is possible we need a multilayer 
writer node, to reconstruct a multilayer OpenEXR 
file at the end of the compositing tree. Usually 
we separate, combine and store the RGBA image files
 in a comp. tree. So it should be a big advantage if 
somebody can help with this request.

If you need i can draw a simple pipeline to 
represent the logic of my idea.

all the best for ya,

      Peter G. Kovacs
digital vfx artist, producer