How can I make a new material or shader into ParaView?

I want to use some other material in ParaView. Now I found the only way can I make it is to open raytracing and using the material of Ospray.
But I don’t want to use raytracing, I only want to use something in rasterization.
The default rendering shader in ParaView may be using a phong model, can I choose or add some other shaders of myself?
I want to locate where the program write a shader file into the project in the source code and I searched for related information of something like shaders in the source code(mainly in the vtk part), but finally what I’ve done can’t up to my aim.
Sorry for my confusing description, hope for your reply :slight_smile: