How to Customize Standard Shader ( Repeating Textures in Mirror Mode )

This is partly questions and mostly the answer.

I have created some sample projects which show you how you can modify and add functionalities to the Standard Shader provided by Unity. ( based on builtin_shaders-5.2.3f1.zip and builtin_shaders-5.3.0f2.zip )

I didn't want to lose degree of freedom provided by the builtin Standard Shader. And I wanted to keep the same inspector UI as the builtin Standard Shader.

You can get your hands on it right out of the zip attached.

Questions:

• Isn't there a way to write a function to modify fragment shader's input before the actual fragment shader is called? ( I mean something like surface shader. )

• What is the best practice in respect to maintenance. Repeating the same modification as every updates to new versions of Unity is just boring...

• It's too bad that you can't derive from StandardShaderGUI because it's defined 'internal'.