Dynamically change Shader property on same gameObject (593484)

Unity Engine
1

I have a shader on a gameObject, Lets call it FooShader. In FooShader there is a public property called _fooVal I want to update in real time.

I’ve created a blank C# script on the same gameObject.
My first problem is how do I reference this FooShader script? And then once I have a correct reference change my _fooVal property?

2

Since shaders are attached to materials, you need a reference to the material that’s being used.
The properties can be set through methods on a material instance, for example the following:

public class FooScript : MonoBehaviour
{
    public Material material;

    void Update()
    {
        this.material.SetFloat("_FooVal", Time.time);
    }

}

All objects sharing this material will have the same value in the above example. If you need independent values for an indeterminate amount of objects, you can do the following:

public class FooScript : MonoBehaviour
{
    public Material material;
    private Material materialInstance;

    void Awake()
    {
        this.materialInstance = (Material)Instantiate(this.material);
    }

    void Update()
    {
        this.materialInstance.SetFloat("_FooVal", Time.time);
    }

}

You can find the rest of the SetX methods in the documentation. By now, you’ve probably found the solution but I’ll post this anyways.

1 Like
3

WOW, THANKS.

This help me also.

I want set different “int” value into the same shader at same frame.

When i use material-instance, it works.