The goal of the 3d library is to enhance and provide additional functionalities for OpenGL. Instead of creating a new 3d engine from scratch to encapsulate OpenGL, the project was redesigned to be an add-on library. This means that you can use the any functions provided by OGL or use the Spectre3d library as needed

The library will provide additional functions in multiples areas: input, video, compression and more

The library is already providing function to initialize OGL but you’re not obliged to use it. The beauty of the library is that you only use the parts that you want.