babl : A dynamic, any to any, pixel format conversion library ( http://www.gegl.org/babl/ )
draco : Library for compressing and decompressing 3D geometric objects ( https://google.github.io/draco/ )
gegl : A graph based image processing framework ( http://www.gegl.org/ )
giflib : Library to handle, display and manipulate GIF images ( https://sourceforge.net/projects/giflib/ )
libuiohook : C library to provide global keyboard and mouse hooks from userland. ( https://github.com/kwhat/libuiohook )
oidn : Intel(R) Open Image Denoise library ( http://www.openimagedenoise.org/ )
opencolorio : A color management framework for visual effects and animation ( https://opencolorio.org https://github.com/AcademySoftwareFoundation/OpenColorIO )
openimageio : A library for reading and writing images ( https://sites.google.com/site/openimageio/ https://github.com/OpenImageIO )
opensubdiv : An Open-Source subdivision surface library ( https://graphics.pixar.com/opensubdiv/docs/intro.html )
openusd : Universal Scene Description ( http://www.openusd.org )
osl : Advanced shading language for production GI renderers ( http://opensource.imageworks.com/?p=osl )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a cg
For Paludis use this rsync : rsync://gentoo.zugaina.org/cg-portage
If you have a problem : ycarus(-at-)zugaina.org