PNG is useful because it allows you to alter the alpha key which is a key added to the Red, Green and Blue keys. The alpha key allows you to edit the opacity from 0 - 255. And this can allows things to be invisable or massively clear.7
For the Narnia page they used a lot of PNG 32. The process would have been
1. Take photo of the cast
2. Edit them appriately.
3. Edit them into a PNG 32 format from Photoshop or Fireworks. While they do that they would elimeinate the backgroudn and make it transparent.
4. After doing this they would set the commands for the home pafe as for timings, sounds when clicked on and extra links.
For the Spiderwick they have some of the following.
They have visual feedback with the book. They did this by incorperating a movie clip on a button on the "over" state. So when you are about to select it then you will go to the page. This is why its visual feedback. The actually graphic would have been created in photoshop or use of traditional media. All the graphics are PNG except the background part of the website. The White Space.
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