Image block tips
PermalinkTo help with ‘Retina’ devices make your image sizes half of actual ‘File’ size.
Example: http://design.55websolutions.uk/retina-test...

When you constrain the image, an img tag is used to display the image. Without constraining the image, a picture tag is used.
I've thought about being able to resize the image, but still use the picture element.
There are a lot of variables involved though, including the size of the thumbnails.