Rewrite shadow mapping to use virtual texturing.

[Angelo1211]

Dynamic shadow mapping is currently the most expensive operation on the renderer, yet it still looks pretty awful. It's also implemented in a way that does not scale well at all and causes way too many API calls. It would be worth it to attempt to implement a more robust system like virtual texturing as seen here:

http://www.adriancourreges.com/blog/2016/09/09/doom-2016-graphics-study/

It would be also worth it to research shadow mapping techniques that leverage the Cluster shading algorithm like the one in the Emil Persson and Ola Olsson talk.

[Angelo1211]

Closing, project is not actively maintained anymore.