How to customize materials through ShaderMaterial ?

Small issue here that has been posted on SO yet there :
http://stackoverflow.com/questions/41958896/customize-material-in-threejs

The thing is : I would like to customize the MeshStandardMaterial, without changing the original shader strings meshphysical_frag and meshphysical_vert obviously.

So I copied them in the fragmentShader and vertexShader strings of a ShaderMaterial (with my changes), and copied the original uniforms (I don't feel like flooding with the whole code, but it is reproduced in the stackoverflow question).

However the render always fails with the following error :

Code:

Cannot read property 'color' of undefined at the function StructuredUniform.setValue

I cannot find where the issue is.

Where is the mistake, is it the correct way to cutomize materials in Threejs ?

Well man, im working on a little material editor where its possible to customize materials and shaders. Im still working on it so please be patient and I will share some code about it ok?
Hope that can be useful.
Let me also check your code as well

Hey, thanks, great project ! no problem.

The full material code is in the stackoverflow question : I first reproduced the original shaders and uniforms without modifications (I think it is from r83), but even that is not working.

Hi man i basically take a look at your example. I think there is something a bit more complicated. For my opinion try this simple material:

Code:

[code]
            var material = new THREE.MeshPhongMaterial( {
               color: 0xff0000,
               shininess: 150,
               metalness: 40,
               specular: 0x222222,
               shading: THREE.SmoothShading
            } );
[/code]

and substitute shading property with variables.
Im still working on materials