Demo 18 - Flatten an model

Shader "Custom/Flatten" {
    Properties {
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Elevation ("Elevation", Range(1, 0)) = 0
    }
    SubShader {
        Tags { "RenderType"="Opaque" }

        CGPROGRAM
        #pragma surface surf Lambert vertex:vert

        sampler2D _MainTex;
        fixed _Elevation;
        struct Input {
            float2 uv_MainTex;
        };

        void vert(inout appdata_full v) {
            v.vertex.y = v.vertex.y - (1 + v.vertex.y) * _Elevation;
        }

        void surf (Input IN, inout SurfaceOutput o) {
            half4 c = tex2D (_MainTex, IN.uv_MainTex);
            o.Albedo = c.rgb;
        }
        ENDCG
    }
    FallBack "Diffuse"
}