What are some alternatives?
When comparing OpenSceneGraph and OpenGL, you can also consider the following products
irrlicht - This caused the Irrlicht homepage and forum to work badly. Over the last days most things started working again – except the forum continues to be broken. Old posts can be read but everything else is currently not working.
Vulkan - Vulkan is a new generation graphics and compute API that provides high-efficiency, cross-platform access to modern GPUs used in a wide variety of devices from PCs and consoles to mobile phones and embedded platforms.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...
Torque 3D - Torque 3D is a easy-to-use game creation platform.