hydra-mark.png is the original transparent image generated with the built-in imagegen tool. The complete prompt and conversion settings are in generation.json. preview.png shows the resulting ASCII glyphs; the shipped asset is image/rootfs/usr/share/hydra/fastfetch.txt.

The 44-column mark uses ordinary ASCII characters, cyan Fastfetch color $1, and a white $2 caption. Pillow is needed only to regenerate the text, not to run Fastfetch or build an image with the checked-in asset.

From the repository root, with Python and Pillow available:

python3 dev/render-logo.py
fastfetch --config image/rootfs/etc/fastfetch/config.jsonc \
  --logo image/rootfs/usr/share/hydra/fastfetch.txt --pipe false

On a Nix development host, the converter can also run in a temporary environment:

nix-shell -p 'python3.withPackages (p: [p.pillow])' \
  --run 'python3 dev/render-logo.py'

The converter uses opacity to preserve the single-color silhouette, removes faint alpha noise, and accounts for terminal character proportions. It preserves the PNG source. Future ISO builds and runtime update bundles include the new text; previously built ISOs and installed guests retain their existing logo.