How can I change the alpha in real time. (see pic)

Questions & Answers
1

17845-untitled.png

How can I change the value of the alpha channel at run time. The one that is in the slider. Right now A = 247.

This code is wrong:

this.renderer.material.color.a = count;

it changes the alpha of something else.

3

Color.a = Value between 0 and 1 using for alpha color

Try this

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour 
{
	public GameObject 	myGameObj;
	public Color		myColor;
	
	void Start()
	{
		myColor = myGameObj.renderer.material.color;
	
	}

	void Update()
	{
		if(Input.GetKeyDown(KeyCode.A))
		{
			
			myColor.a = (247f/255f); // for alpha color 247
			myGameObj.renderer.material.color = myColor;
		
			
		
		}
		if(Input.GetKeyDown(KeyCode.B))
		{
			
			myColor.a = (200f/255f); // for alpha color 200
			myGameObj.renderer.material.color = myColor;
		
		}
	}
	

}
2

It might be revealing what “something else” it is changing. You could be much more descriptive about your problem. Using C# maybe something like this:

Color newColor = renderer.material.color;
newColor.a -= 0.1f;//this can change it over time
renderer.material.color = newColor;