richpaul

That’s fantastic. Many thanks. Regenerating the thumbnails was the thing I had missed; that plugin is very useful.

One other thing to note for anyone else that stumbles across this, I also had to change the width for ‘Large size’ in Settings > Media in the WP dashboard as that was capped at 1024px by default.

Many thanks again sacredpath.

Hi sacredpath (or anyone else that would like to help) – a quick follow-up:

While this worked brilliantly and produces full-screen images, the featured images created are still only 984px wide originally and therefore scaled if the browser width is above this size. This makes the images quite noticeably pixelated on larger screens.

Is there any easy way around this? I had a look at the Post Thumbnail sections in the functions.php file, but changing any of the 984 values didn’t seem to change anything?

Worked like a charm, thank you. Was having trouble separating the post-thumbnail width from the header width, but that works perfectly ??