![]() ![]() Until I found someone who did not have this problem, I asked them to share their wallpaper with me and I tried it, sure enough, their wallpaper did not have any on screen artifacts and the resulting compressed wallpaper, was not a shrunken down jpg. I had this problem myself, searched endlessly for an answer and found none. ![]() Let's just hope Windows 10 won't be such a colossal disappointment in that regard. You can't use actual PNG images, you have to use JPGs.You won't be able to use wallpaper slideshows (at least not the native sort).You have to go through all this permission nonsense every time you change the wallpaper (you might be able to automate this through batch scripts, but I have no idea how to do that).Obviously, there are drawbacks to this method, namely: "Look ma, no artifacts!" (Wallpaper taken from Louie Mantia's wallpaper page) If you did everything right, your wallpaper shouldn't look like garbage anymore. When you're done, log out, then log back in again. The first combobox says 'Allow', the second one makes it so that the permissions are applied to all files and folders inside that folder recursively. I don't know what these options are called in English versions of Windows, but I imagine their positions to be the same. To do that, fiddle with the security settings of the TranscodedWallpaper file and the CachedFiles folder until it looks like this: To make your wallpaper just work (and also to stop the OS from undoing what you've done so far) you'll need to revoke the system user's write access. The actual resolution of the wallpaper does not matter as far as I could tell, Windows just reuses whatever wallpaper setting was set. Copy your wallpaper's JPG version into this folder as well and rename it to whatever you just copied. ![]() Find the one that matches your active resolution, copy its filename, then delete all the files. Inside should be one or more JPG files, each named like this: CachedImage_2560_1440_POS4.jpg (substitute the numbers with your resolution's width and height). The TranscodedWallpaper file inside is a JPG image without a file extension, replace it with a 100%-JPG version of the wallpaper you want to use. Open X:\Users\\AppData\Roaming\Microsoft\Windows\Themes\. There was an answer here, I even upvoted it and accepted it as the correct answer, but it seems to have vanished. While it's probably still the best way of doing things because Windows can't even touch your files that way, there's another way above. It'll look better, but behind the scenes, it's still just a re-encoded JPEG, so don't expect any miracles. Restart (or log out and back in, I just restarted) and re-set your wallpaper. Your registry should look like that now (with the new value highlighted): Dunno who first found it, but here's a nice writeup: ģ) Go to where I am in the picture (HKEY_CURRENT_USER>Control Panel>Desktop)Ĥ) Right click on desktop and select new DWORD ![]()
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