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any thoughts how you would implement this? To apply the sepia filter to the street view images would double the storage used for all the images, which is huge! Alternatively to apply the sepia filter each time a image is loaded would add a lot of load to the servers, especially if the joke is spread around the world? So some kind of caching would be in place? Or is it done in browser with the flash plugin which would be the most boring option, but also the most plausible... (that would also explain why the webgl version does not work)

The world map is just images at different zoom levels with an algorithm that adds trees, that would not be a problem I guess?



If you load a streetview you might see a split second of color, before the (flash) sepia filter gets added.

If you turn on 3D mode (right mouse -> 3D mode on) the ring and dust/scratches remain, but the sepia filter is removed.

If the maptype parameter is 8 (&t=8) assets get loaded from the "papermaps" directory:

  https://maps.gstatic.com/intl/en_ALL/mapfiles/papermaps/
Instead of:

  https://maps.gstatic.com/intl/en_ALL/mapfiles/
This way I found an image of the map controls that isn't implemented:

  https://maps.gstatic.com/intl/en_ALL/mapfiles/papermaps/mapcontrols3d2.png
Notice the squiggly lines and the streetview icon.

The world map seems to be indeed just images. Compare:

  http://maps.gstatic.com/mapfiles/mv/hpimgs6.png
  http://maps.gstatic.com/mapfiles/papermaps/hpimgs.png


Seems like it is implemented using Flash (right click on the street view image and you'll see the Flash context menu)




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