This saver arranges your photos to form 3D constructions, such as a city block with buildings. Mac OS X 10.5 "Leopard" only (sorry). Works better on machines with good graphics, such as the iMac or MacBook Pro, but does work OK on MacBooks (you may need to reduce the size in the options). This software is freeware offered on an as-is basis; by downloading, you accept full responsibility for the use of it and all consequences thereof. More screenshots here.
Download 1.0 for Mac OS X 10.5
Installation instructions: Download, open MovingPhotos.saver. Confirm installation; you'll then be taken to the Screen Saver preferences pane. Scroll down the list to Other and click on MovingPhotos. By default a single default photo is used, so click Options... then Choose Folder... You can choose your iPhoto Library.
Things to try. If it runs well, try increasing the image quality. It can be fun to adjust the rest of the parameters as well (especially with the speed turned up, to get quick results). For example, try maxing the size adjustment (to get more photos) while lowering the image quality to minimum (so your graphics card has a better chance of keeping up). Then try the reverse.
Troubleshooting. If it doesn't work, make sure you're downloading the zip file to your computer and unzipping yourself in the Finder (ie, turn off the "open safe files after downloading" option in Safari preferences). If you get jerky animations, you need to reduce the size or quality in the options. I've tested this on various Macs, mostly running 10.5.4.
Email questions to movingphotos3d at gmail.com. Feedback and suggestions are very welcome.
The MD5 checksum of the zip file is ab3ae741bfd19cb2f670064aea83b701.
Thanks to: Apple, for making Core Animation part of Leopard, and Scott Stevenson, for technical assistance.
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