Change Standard Shader Render Mode in Runtime

Only way I can get this working is to use 2 materials and just lerp between them, to change an object from opaque to transparent.

Unity 5.0.1f1

Code (CSharp):

1. void Start () {
2.         _ren = GetComponent<Renderer>();
3.         _mat = _ren.material;
4.         _control = _mat.color;
5.         _control.a = 1;
6.         _mat.color = _control;
7.         _mat.SetFloat ("_Mode", 0);
8.         print (_mat.GetFloat("_Mode"));  //prints 0
9.         Invoke ("MakeTransparent", 5);
10.     }
11.  
12.     void MakeTransparent(){
13.         _control.a = 0.2f;
14.         _mat.color = _control;
15.         _mat.SetFloat ("_Mode", 3);
16.         print (_mat.GetFloat("_Mode")); //prints 3 but the shader doesn't change in game
17.     }

If I start in transparent mode, the MakeTransparent function does change the alpha and such, but if it starts opaque it stays opaque in runtime even if the alpha is set to 0, the mode isn't refreshing when it's changed...

How do I call .WarmUp() on a material? Er, how do I get the reference to
ShaderVariantCollection.WarmUp

 

Check the Standard.shader in builtin shaders. There's two things you need to do. First in your shader you should write like this

Code (CSharp):

1. Properties
2. {
3.   ....//your shader's property
4.   [HideInInspector]_SrcBlend ("", Float) = 1
5.   [HideInInspector]_DstBlend ("", Float) = 0
6. }
7.  
8. SubShader
9. {
10.     Tag {"Queue"="Opaque"}
11.     Blend [_SrcBlend] [_DstBlend]
12.  
13.     ....//your shader code
14. }

this shader for default is opaque. when you need it to be transparent :

Code (CSharp):

1. material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
2. material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
3. material.renderQueue = 3000;

when you need it back to opaque :

Code (CSharp):

1. material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
2. material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
3. material.renderQueue = -1;

 

Hi thanks

could you tell me where should i put the second and third script? (on a new C# script and add it to the gameobject or add the two scripts to the same shader as the first script

 

You can put it in anywhere. I'm guessing u don't know how to get the material variable. It's like first you get the GameObject you want to change, and then get the Renderer component and get the material attribute.

Code (CSharp):

1. GameObject g = GameObject.Find("XXXX");
2. Renderer r = g.GetComponentInChildren<Renderer>();
3. Material material = r.material;
4.  
5. //..modify the material..

 

Thanks man i appreciate that

 

Many thanks! It helped me a lot for solving the issue I was facing. It's a pity that until now there's no specific API-Call.

 

How can I change the material render mode via code, but at Editor and not at runtime