Paint 3D app is now available to download and install from Store. You need to be running Windows 10 Creators update aka Redstone 2 Build for installing it on your PC.
Dona Sarkar from Microsoft has revealed that Paint 3D will be the first Windows 10 Creators update feature coming to Insiders. Other features will be released in bits over weeks and months to Insiders. Read what all features and changes Creators update brings with itself by clicking here.
#WindowsInsiders: the creators' features will start rolling out in bits over the next few weeks and months. First step: paint3d in the store
— Dona Sarkar @ #MSIgnite (@donasarkar) October 27, 2016
Paint 3D app has been sighted in the Windows 10 Store, but you can’t install it yet. It may be available shortly for Insiders in Fast ring.