Changing Cylinder Colour Affects Shader

Hello

I am attempting to change the colour of a Cylinder at runtime.

My Problem: When I change the cylinders texture I loose the materials shader. The cylinder now looks flat and has no shadows (so I think its the shader or maybe something else?)

The cylinder has the material `Default-Diffuse` when the game starts and I change the cylinders material colour to `Color.red` at runtime. See below how the colour changes correctly but the shader disappears - the cylinder looks flat.

Cylinder look at Application start:


Cylinder look after I change the colour:


What am I doing wrong? And how can I make sure the clylinder still looks 3d/has shadows/has its shader?

Code - This script is attached to a Cylinder GameObject:

Code (csharp):

1. using UnityEngine;
2.     using System.Collections;
3.    
4.     public class Segment : MonoBehaviour {
5.        
6.         #region Static Variable
7.         public static readonly string   SEGMENT_PREFAB_NAME = "concretePipe/ConcretePipePrefab";
8.         public const double             SEGMENT_SCALE_X     = 0.01f;
9.         public const double             SEGMENT_SCALE_Y     = 0.01f;
10.         public const double             SEGMENT_SCALE_Z     = 0.01f;
11.         #endregion
12.        
13.         #region Instance Variables
14.         #endregion
15.        
16.         public virtual void initialise(string name, Transform parent) {
17.             this.name             = name;
18.             this.transform.parent = parent;
19.         }
20.        
21.         public virtual bool setColour(Color colour) {
22.             if (renderer == null)
23.                 return false;
24.            
25.             Debugger.print ("Prior: shader " + renderer.material.shader.ToString()); // Prior: shader Diffuse
26.             renderer.material.color = colour;
27.             Debugger.print ("Post: shader " + renderer.material.shader.ToString());  // Post: shader Diffuse
28.            
29.             //float lerp = Mathf.PingPong(Time.time, 1f) / 1f;
30.             //renderer.material.color = Color.Lerp(colour, Color.white, lerp);
31.             return true;
32.         }
33.     }

 

No Advice?