OpenEXR: Multi-part writing

Browse Source

New "Interleave" option in image format settings, enabled by default in old
files and disabled by default in new files to write multi-part files.

By not storing all channels interleaved, it is possible for other applications
to load individual passes more efficiently. This might also work better with
compression.

We follow the OpenEXR docs in that the channel name is the full
Layer.Pass.Channel rather than just Channel. Some other renderers
(e.g. Houdini Karma) write just the channel and that is what our reading
code assumed so far.

I've verified that Nuke can read the multipart EXR files produced by Blender,
including multiview and cryptomatte.

Fix #123727

Pull Request: https://projects.blender.org/blender/blender/pulls/146650

...

This commit is contained in:

Brecht Van Lommel

2025-09-25 10:48:36 +02:00

parent 9851e34c71

commit be1619f4ad

18 changed files with 155 additions and 35 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

BIN

tests/files/compositor/file_output/exr_multipart.blend (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multilayer_multipart0001_L.exr (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multilayer_multipart0001_R.exr (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multilayer_singlepart0001_L.exr (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multilayer_singlepart0001_R.exr (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multiview_multipart0001.exr (Stored with Git LFS) Normal file

Binary file not shown.

BIN

tests/files/compositor/file_output/exr_multipart/multiview_singlepart0001.exr (Stored with Git LFS) Normal file

Binary file not shown.