Livelink functionality in the Substance in Unreal Engine plugin
First, we are exporting asset from Unreal to Substance Painter by right-clicking on object in UE4 Editor and choosing “send to Substance Painter”. Unreal automatically creates SP folder in project directory and Substance Painter automatically created project with the name of exported mesh. you also have “Unreal” icon in Substance Painter that indicates that link was established.
Each change made in Substance Painter is automatically updated in Unreal Engine viewport. At first, when you switch views you may see that the textures are low-res. After you click in the viewport, full-resolution textures are loaded.
You can configure how fast should SP send textures to Unreal and what resolution to use in preview and for final versions of textures.