GLSL shader conversion

Fixed

Shader "Unlit/CustomUnlit_restored"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}

	SubShader
	{
		Tags { "RenderType"="Opaque" }
		Pass
		{
			Tags { "RenderType"="Opaque" }
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag

			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex0 : POSITION0;
				float2 tex0 : TEXCOORD0;
			};

			struct v2f
			{
				float4 vertex : SV_POSITION;
				float2 tex0 : TEXCOORD0;
				float tex1 : TEXCOORD1;
			};

			float4 hlslcc_mtx4x4unity_ObjectToWorld[4];
			float4 hlslcc_mtx4x4unity_MatrixVP[4];
			float4 _MainTex_ST;
			sampler2D _MainTex;

			v2f vert(appdata v)
			{
				v2f o;
				float4 u_xlat1;
				o.vertex = UnityObjectToClipPos(v.vertex0);
				float u_xlat0 = o.vertex.x * (-o.vertex.x);
				o.tex1 = exp2(u_xlat0);
				o.tex0.xy = v.tex0.xy * _MainTex_ST.xy + _MainTex_ST.zw;
				return o;
			}

			fixed4 frag(v2f i) : SV_Target
			{
				float4 color0;
				float u_xlat0;
				float4 u_xlat1;
				float3 u_xlat2;
				u_xlat0 = i.tex1;
				u_xlat0 = clamp(u_xlat0, 0.0, 1.0);
				u_xlat1 = tex2D(_MainTex, i.tex0.xy);
				u_xlat2.xyz = u_xlat1.xyz + (-unity_FogColor.xyz);
				u_xlat1.xyz = u_xlat0 * u_xlat2.xyz + unity_FogColor.xyz;
				color0 = u_xlat1;
				return color0;
			}
			ENDCG
		}
	}

}

Original

Shader "Unlit/CustomUnlit"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 100

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv);
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
			ENDCG
		}
	}
}

Restored

Shader "Unlit/CustomUnlit_restored"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}

	SubShader
	{
		Tags { "RenderType"="Opaque" }
		Pass
		{
			Tags { "RenderType"="Opaque" }
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag

			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex0 : POSITION0;
				float2 tex0 : TEXCOORD0;
			};

			struct v2f
			{
				float4 vertex : SV_POSITION;
				float2 tex0 : TEXCOORD0;
				float tex1 : TEXCOORD1;
			};

			float4 hlslcc_mtx4x4unity_ObjectToWorld[4];
			float4 hlslcc_mtx4x4unity_MatrixVP[4];
			float4 _MainTex_ST;
			sampler2D _MainTex;

			v2f vert(appdata v)
			{
				v2f o;
				vec4 u_xlat0;
				vec4 u_xlat1;
				u_xlat0 = v.vertex0.yyyy * hlslcc_mtx4x4unity_ObjectToWorld[1];
				u_xlat0 = hlslcc_mtx4x4unity_ObjectToWorld[0] * v.vertex0.xxxx + u_xlat0;
				u_xlat0 = hlslcc_mtx4x4unity_ObjectToWorld[2] * v.vertex0.zzzz + u_xlat0;
				u_xlat0 = u_xlat0 + hlslcc_mtx4x4unity_ObjectToWorld[3];
				u_xlat1 = u_xlat0.yyyy * hlslcc_mtx4x4unity_MatrixVP[1];
				u_xlat1 = hlslcc_mtx4x4unity_MatrixVP[0] * u_xlat0.xxxx + u_xlat1;
				u_xlat1 = hlslcc_mtx4x4unity_MatrixVP[2] * u_xlat0.zzzz + u_xlat1;
				u_xlat0 = hlslcc_mtx4x4unity_MatrixVP[3] * u_xlat0.wwww + u_xlat1;
				u_xlat1.x = u_xlat0.z * unity_FogParams.x;
				o.vertex = u_xlat0;
				u_xlat0.x = u_xlat1.x * (-u_xlat1.x);
				o.tex1 = exp2(u_xlat0.x);
				o.tex0.xy = v.tex0.xy * _MainTex_ST.xy + _MainTex_ST.zw;
				return o;
			}

			fixed4 frag(v2f i) : SV_Target
			{
				fixed4 color0;
				float u_xlat0;
				vec4 u_xlat1;
				vec3 u_xlat2;
				u_xlat0 = i.tex1;
				u_xlat0 = clamp(u_xlat0, 0.0, 1.0);
				u_xlat1 = tex2D(_MainTex, i.tex0.xy);
				u_xlat2.xyz = u_xlat1.xyz + (-unity_FogColor.xyz);
				u_xlat1.xyz = u_xlat0 * u_xlat2.xyz + unity_FogColor.xyz;
				color0 = u_xlat1;
				return color0;
			}
			ENDCG
		}
	}

}