Cascaded Shadow Maps

[dankcatlord]

Is your feature request related to a problem? Please describe. This feature would mitigate the problem of needing high resolution shadow maps for smooth sharp shadows that decrease performance.

Describe the solution you'd like Add support for multiple shadow maps in the shaders properties file. A shader properties could define multiple shadow maps and use each of them for cascaded shadow maps.

Describe alternatives you've considered

Additional context Cascaded shadow maps are documented at https://docs.microsoft.com/en-us/windows/win32/dxtecharts/cascaded-shadow-maps. There is a feature request for optifine to add cascaded shadow maps at sp614x/optifine#659. This feature is implemented in vram-guild/canvas