title: Tumblr grid theme with thumbnails of equal pixel area
body: <p>Are there any grid themes for tumblr that use thumbnails of equal pixel area across both landscape and portrait aspect photos? 
  Nearly all the grid themes I've found make you choose a number of columns (1,2,3) use {PhotoURL-400} for browsing the blog. This results in each Landscape photo occupying less than half the area as the Portrait photos, and basically treating them with less importance.</p>
  
  <pre>The URL width is fixed by tumblr, height varies.
  Examples here assume 3:2 or 2:3 aspect ratio:
  URL Landscape               Portait
  500 500x333(166,500 pixles) 500x750(375,000 pixels)
  400 400x267(106,000 pixels) 400x600(240,000 pixels)</pre>
  
  <p>What I am seeking is a theme where the Landscape images would use the {PhotoURL-500} (500x333) and the Portrait images would use (either Photo-URL400 or 500) which is more than needed, but could be scaled down to 333x500 to cover the same area as the Landscape images. This would also mean that the number of columns per row could vary, based on the aspect ratio of the content for that row. Yes, there would be gaps (aka white space) but use of white space can be good!</p>
  
  <p>Thanks</p>
  
  <p><img src="https://i.stack.imgur.com/K9Bvc.jpg" alt="example"></p>