Description:
Panoramic menu/title screen background captured from the pack.png seed.
It's less authentic, because the world has generated in beta 1.7, but the image rendered in 1.12.2, therefore you can see some dark forest too.
Should be working fine with any Minecraft Java edition where the custom resource pack setting is available (tested on 1.19.3).

Installation:
Copy the zip file into your Minecraft resource pack folder,

Windows: c:\Users\<your username>\AppData\Roaming\.minecraft\resourcepacks\
Linux: \<your Home directory>\.minecraft\resourcepacks\

Start the game, navigate to the Resource pack settings (Options/Resource packs),
then select the pack_png resource pack.
Ignore the incompatible error message if it appears.

I hope you'll like it! :)