Change standart shaders

[MnogoZnaet]

I would like to experiment with PBR in order to learn shaders better, how can I make changes in standart shaders and see the result in engine examples on Windows

[nmfisher]

You need to write a .mat file, compile with matc, and subclass MaterialProvider to load this file (preferred), or use the uberz utility to replace the custom ubershader with this material.