This looks promising for command-line use, could run it after making the .exr file with unity to compress it? https://github.com/OpenImageIO/oiio
by user 103054507105067008
From three:
OpenEXR loader currently supports uncompressed, ZIP(S), RLE, PIZ and DWA/B compression.
Supports reading as UnsignedByte, HalfFloat and Float type data texture.
DWA/B is ideal, we use Blender to export our .EXR files as DWAA/DWAB https://docs.blender.org/api/3.4/bpy_types_enum_items/exr_codec_items.html
by user 103054507105067008
Hm, TinyExr doesn’t support that with the note “not planned, patent encumbered”
I looked around and found OpenImageIO linked above which has better support for EXR compression
https://github.com/OpenImageIO/oiio
by user 103054507105067008
Love stumbling across developer snarkyness about stuff like this 
https://github.com/syoyo/tinyexr/pull/168
by user 103054507105067008
Thing is we always need Windows / Linux / Mac / ARM Mac support and ideally something that has a fully ready npm package 
OIIO doesn’t have that as far as I’m aware
Still searching for something like that 
in the meantime if there is any possibility of telling Needle to not touch the .exr file that would be ace as I can keep using Blender to export my EXRs as needed for small file sizes
by user 103054507105067008