no gleam
packthe glass loses its stripes

a resourcepack, not a mod: vanilla's own glass textures with the interior gleam-stripes cleared to honest transparency. the frames stay, so a window is still a window; the sixteen stained variants keep a faint uniform wash, so stained glass still reads stained; pane tops wear their frame's colour, so edges survive from above.
thirty-four textures, every one derived from the game jar by a deterministic script — nothing hand-painted, nothing that can drift from vanilla when vanilla changes. drop the zip in resourcepacks and, if the instance also runs a connected-textures glass pack, order this one above it: one source of truth.