The best Shell Extension alternative to ScreenPlay is Wallpaper Engine. It's not free, so if you're looking for a free alternative, you could try VDesktop. If that doesn't suit you, our users have ranked more than 50 alternatives to ScreenPlay and three of them are Shell Extensions so hopefully you can find a suitable replacement.
Enhance your Windows desktop with animated wallpapers like 3D, 2D, videos and more. Customize with a built-in editor, share via Steam Workshop, and stay ad-free with companion app support for Android.
Bring your wallpaper to life with DeskScapes! DeskScapes is a program that allows users to have animated wallpaper on their Windows desktop. It supports playing video as animated wallpaper, dynamically generated content as animated wallpaper, and more.
VDesktop is a program that allows users to have animated wallpaper on their Windows desktop. VDesktop supports Windows 7, 8, 10.
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ScreenPlay is very close concept-wise to Wallpaper Engine though it has several other features beyond just wallpaper. It lacks the complex wallpaper maker Wallpaper Engine has but the script based focus is very easy for coders and it has the benefit of automatically being cross-platform for Mac, Windows and Linux.