1

This should be basic right? Put a texture in front of the camera and make the alpha lerp, move towards, whatever to 0. Well, this code:

Texture2D theTexture;
	
	void  OnGUI (){
		
		GUI.color.a = Mathf.Lerp(0.0f, 1.0f, (Time.time / 2));
		
		GUI.DrawTexture( new Rect(0,0,Screen.width, Screen.height), theTexture);
		
	}

produces this error:

error CS1612: Cannot modify a value type return value of `UnityEngine.GUI.color'. Consider storing the value in a temporary variable

I understand this would work in javascript, but C# makes GUI.color read only, how would I go about this?

Thanks in advanced.

2

The problem is here: GUI.color.a = Mathf.Lerp(0.0f, 1.0f, (Time.time / 2));
You can not set GUI.color value seperately, you should set its value like this:

GUI.color = new Color(GUI.color.r, GUI.color.g, GUI.color.b, 0)
GUI.color = Mathf.Lerp(GUI.color, new Color(GUI.color.r, GUI.color.g, GUI.color.b, 1), (Time.time/2));