Bug Why is this code not changing my material's alpha?

I have this very simple script here.

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class Epilepsy: MonoBehaviour
7. {
8.     private Color colore;
9.     // Start is called before the first frame update
10.     void Start()
11.     {
12.         colore = this.GetComponent<Renderer>().material.color;
13.     }
14.  
15.     // Update is called once per frame
16.     void Update()
17.     {
18.         colore.a = Random.value;
19.     }
20. }
21.  

It should, on every frame, modify the object's Alpha every tick. (object is a red cube)
Unfortunately, the object's transparency stays the same, and I have no idea of what's causing it.



I've also tried changing the the shader of the material, from standard, to every type of shader that had transparent in its name, but it doesn't seem to be working. Why?

 

Is the material itself set to anything other than Opaque? Opaque will ignore alpha.

 

Yes! I've read about that, unfortunately, it's set as transparent (which means the rendering mode isn't the issue... maybe?)



Tried changing the source as well, but it still didn't solve the issue.

 

Oh ... I had a first real look at your code just now ... the issue is obvious:

Code (CSharp):

1.     void Start()
2.     {
3.         colore = this.GetComponent<Renderer>().material.color;
4.     }
5.     // Update is called once per frame
6.     void Update()
7.     {
8.         colore.a = Random.value;
9.     }

You change the local instance of color. Color is a struct, a value type, that means every assignment creates a copy. You actually need to assign it back after changing it, for example:

Code (CSharp):

1. var renderer = this.GetComponent<Renderer>();
2. colore = renderer.material.color;
3. colore.a = Random.value;
4. renderer.material.color = colore;

 

Are you instantiating these cubes from prefabs? Can you show how you're doing this?

 

Yep! This was it.
I was operating on the assumption that Color was an object,
Thank you for your time!