IT seems that aximmetry have one of powerful shader systems that i have seen but there a lot types of shaders and some are duplicated.
so which and when to use these shaders? lastly how to create new shader?
Here is the doc on creating new shaders:
https://aximmetry.com/en/documentation/Manuals/Creating%20New%20Shaders.pdf
You can find the doc on the shader types here:
https://aximmetry.com/en/documentation/Manuals/Shader%20Categories%20and%20Naming%20Convention.pdf
I'll provide you another one on creating shaders soon.