A theme with clamshell and slate stones and a Kaya board for Sabaki, Rendered in Blender. The nacre material of the white stones is based on a material by ata4 (CC-0 license).
Download the theme file and install it directly inside Sabaki under 'Preferences' > 'Themes' > 'Install Theme...'.
To create a Sabaki theme archive, install dependencies using npm, then run the build script:
npm install
npm run build
This will create shell-slate-soft.sabakitheme.asar.
Everything is released under public domain.