Glass Clear

Clear Glass is a minimal resource pack that gives you clean, invisible-center
glass without changing anything else about the game’s look.

– Vanilla outline, clear middle: glass blocks keep their classic white border
  but the center is 100% see-through – the little streak marks in the vanilla
  texture are removed completely.
– Glass panes included: thin window panes get the same clear treatment, so
  pane walls and windows match the blocks. Pane tops keep the thin vanilla bar
  so panes stay visible from above.
– Purist-friendly: uses the official 26.3 vanilla border art, just with a
  transparent center. It looks like Minecraft – only cleaner.
– Client-side only: works in singleplayer and on any multiplayer server
  without the server installing anything. Works great with Fabric (it’s just a
  resource pack – no mod needed).
– Tiny and conflict-free: replaces exactly one texture (glass.png), so it
  stacks on top of any other pack you like.