changing opacity of object with raycast

I am trying to change the opacity of an object using a raycast, but it doesnt seem to change. I have no errors and the raycast debug.log is printing corrects, just the opacity is not changing. Could anyone please help with out with what might be the issue?

Code (CSharp):

1.  if (Physics.Raycast(ray, out hit, Mathf.Infinity))
2.         {
3.             if (hit.collider.tag == "stationary")
4.             {
5.                 Debug.Log("Building hit");
6.                 hitObject = hit.transform.gameObject;
7.                 Color changeObjOp= hitObject.GetComponent<Renderer>().material.color ;
8.                 changeObjOp.a = 0;
9.             }
10.             else if (hit.collider.tag == "player")
11.             {
12.                 Debug.Log("Player hit");
13.             }
14.             else
15.             {
16.                 Debug.Log("Else hit");
17.             }
18.         }

 

Does it work when you set the alpha to zero in the inspector ? i think you have to switch to transparent (or fade) mode to use the alpha property...

 

When i click on the color next to Albedo in the material shader and lower the a in there, the object changes opacity. I have the rendering mode set to transparent, is that what you mean?

 

You get the colour and change the a value, but never assign it back to the material. Color is a value type, like int or Vector3.

You also might need to set the colour differently depending on your shader and pipeline. Certain properties on the material class don't function properly outside of the built-in pipeline with the old standard shader.

 

Ohhh of course, silly of me that that did not even occur to me. Thanks for pointing that out, I will see if i can sort it out now. I am just using the standard shader. Think i might be able to use setColor, so will try that