The Sceneform SDK provides a high-level scene graph API, high-performance 3D renderer, and Android Studio tooling to make it easy for Android developers to work with 3D without having to know OpenGL.
sceneform makes it straightforward to render realistic 3D scenes in AR and non-AR apps, without having to learn OpenGL. It supports a physically based renderer (PBR) provided by Filament.
Google ARCore release 1.16.0 went open-sourced that allows developers to extend Sceneform's features and capabilities.
At the moment Sceneform repository has been archived and it no longer actively maintaining by Google.
More information on Sceneform can be found on Google Developers Resource. Samples and issues are located on GitHub.