Solution for server start problem I encountered on CachyOs

Tue Nov 10, 2026 11:07 am

Helllo everyone, freshly new Octane Blender user here.

I wanted to post a small solution I found trying to start OctaneServer on cachyOs.
It seems that cachyOs rolls out with

zlib-ng-compat

library to replace the common

zlib

(which should be optimized for games but i have not investigated further).

it was giving me this error:

Code: Select all

❯ ./OctaneServer
libpng error: unexpected zlib return code
fish: Job 1, './OctaneServer' terminated by signal SIGSEGV (Address
boundary error)

By forcing the library

libz.so.1.3.1

that I installed separately I was able to make it start properly
with the 31.12-stable:
(code run from the OctaneServer directory)

Code: Select all

mkdir -p /tmp/octane-zlib-test
  ln -sf /usr/lib/libz.so.1.3.1 /tmp/octane-zlib-test/libz.so.1
  LD_LIBRARY_PATH=/tmp/octane-zlib-test ./OctaneServer

Hope it can be helpful to someone or to devs to make a workaround for this linux distribution.

P.S.
Was a pleasure to meet linograndiotoy in person at Blendercon2026 in Amsterdam, did not knew him before, but i got interested in his work and decided to give Octane a go.
Big wave from a friendly italian Pino