Bethesda have released their new High Resolution Texture Pack for Fallout 4, which weighs in at a damn hefty 54.7GB - but there are some people, myself included, who can't download it.
Fallout 4's own DLC tab doesn't appear for me, but those with mods installed have no issues. If you're having a problem finding, or being able to download the 54GB high-res texture package, here's a trick that should help you.
Right click 'Fallout 4' in your game library, and click 'View Downloadable Content'.
You should see the High Resolution Texture Pack in the menu, with the checkbox - untick it, close the DLC tab. Reopen the DLC tab, and tick it again - and you should begin downloading the Fallout 4 High Resolution Texture Pack.
And there you go! Begin downloading!
Comment below with some screenshots from the game, and let us know what hardware you're running on it.