Confusion in visualizing normal.

I am new to writing shaders in unity and I wanted to just visualize the normal in a standard surface shader but why am I always getting red color?

 

Which Unity version do you use ?
Can you insert all shader code, maybe something else is broken.
It seems like a bug.

For test, I checked this simple normal visualiser, and it works OK with built-in Sphere gameobject:

Code (CSharp):

1. Shader "Show Normals"
2. {
3.     Subshader
4.     {
5.         Tags { "RenderType" = "Opaque" }
6.         CGPROGRAM
7.         #pragma surface SurfaceShader Standard vertex:VertexShaderFunction
8.  
9.         struct Input
10.         {
11.             float3 color;
12.         };
13.        
14.         void VertexShaderFunction (inout appdata_full v, out Input o)
15.         {
16.             o.color = UnityObjectToWorldDir(v.normal);
17.         }
18.  
19.         void SurfaceShader (Input IN, inout SurfaceOutputStandard o)
20.         {
21.             o.Albedo = IN.color;
22.         }
23.  
24.         ENDCG
25.     }
26. }