Changing properties during runtime

I'm new to shaders and found this code online to help with blending between two textures

Code (csharp):

1. Shader "Fading" {
2. Properties {
3.     _Blend ("Blend", Range (0, 1) ) = 0.0
4.     _BaseTexture ("Base Texture", 2D) = "" {}
5.     _OverlayTexture ("Texture 2 with alpha", 2D) = "" {}
6.  
7. }
8. SubShader {
9.        Pass {
10.          SetTexture[_BaseTexture]
11.          SetTexture[_OverlayTexture] {
12.           ConstantColor (0,0,0, [_Blend])
13.           combine texture Lerp(constant) previous
14.          }
15.        }
16.     }
17. }

Which works fine with the use of the slider in the editor however, I'm wondering if I can change the Blend property during runtime so that it fades slowly over time. I've had a look into the SetFloat function in my script however nothing has appeared on screen.

Many thanks!

 

You'll need to look at renderer.SharedMaterial.SetFloat( "_Blend", value ); with the script attached to the object you want to have fade in/out.