Hey. Iam learning shaders and now Iam stuck on this problem.
Iam trying to make ramp effect, but still I get this smoothed lighting.
I tried to look answers from this forum but cant find any help. Maybe it is Linux? If you spot what is wrong in this, please let me know. 
Thank you!
Unity version 5.4.2
Ramp texture:
Wrap mode = Clamp
Filter mode = Point
And my shader:
// Upgrade NOTE: replaced '_World2Object' with 'unity_WorldToObject'
Shader "Unlit/test2"
{
Properties
{
_Color ("Color", Color) = (1,1,1,1)
_Float ("Value", Range(-100,100)) = 0
_MainTex ("Texture", 2D) = "white" {}
_RampTex ("Ramp", 2D) = "white" {}
}
SubShader
{
pass{
Tags{"LightMode" = "ForwardBase"}
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
float4 _Color;
float _Float;
sampler2D _RampTex;
sampler2D _MainTex;
float4 _LightColor0;
struct vertexInput{
float4 vertex : POSITION;
float3 normal : NORMAL;
float2 texcoord : TEXCOORD0;
};
struct vertexOutput{
float4 pos : SV_POSITION;
float4 col : COLOR;
float2 texcoord : TEXCOORD0;
};
vertexOutput vert(vertexInput v){
vertexOutput o;
float3 normalDirection = normalize(mul(float4(v.normal, 1), unity_WorldToObject).xyz);
float3 lightDirection;
float atten = 1.0;
lightDirection = normalize(_WorldSpaceLightPos0.xyz);
float3 diffuseReflection = atten * _LightColor0.xyz * _Color.rgb * max(0.0,dot(normalDirection, lightDirection));
float3 lightFinal = diffuseReflection + UNITY_LIGHTMODEL_AMBIENT.xyz;
lightFinal = tex2D(_RampTex, float2(lightFinal)).rgb * _LightColor0.xyz;
o.texcoord = v.texcoord;
o.col = float4((lightFinal), 1),
o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
return o;
}
float4 frag(vertexOutput i) : COLOR{
fixed4 texColor = tex2D(_MainTex, i.texcoord);
return texColor * i.col;
}
ENDCG
}
}
}
