[wp-trac] [WordPress Trac] #33299: Improve featured image preview for transparent background images

[WordPress Trac]

#33299: Improve featured image preview for transparent background images
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 Reporter:  laura20          |       Owner:
     Type:  enhancement      |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Post Thumbnails  |     Version:  4.2.4
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:  ui
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Comment (by afercia):

 With a few lines of CSS 3 :)
 http://lea.verou.me/css3patterns/#checkerboard

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Ticket URL: <https://core.trac.wordpress.org/ticket/33299#comment:8>
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