Screenshots of Windows 10 build 10031 have leaked online today, revealing a transparency effect that has been applied to the Start Menu. Microsoft previously said that transparency would not only be hitting Windows 10, but Windows 10 for the phone too.
Looking at the screenshot, it's clear to see a rather subtle effect on the menu itself, though no other part of the OS appears to be altered as-of-yet. Microsoft is expected to release a new build of the Windows Phone technical preview soon, which should contain Project Spartan.
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Rich Edmonds was formerly a Senior Editor of PC hardware at Windows Central, covering everything related to PC components and NAS. He's been involved in technology for more than a decade and knows a thing or two about the magic inside a PC chassis. You can follow him on Twitter at @RichEdmonds.