Shader to shader graph unity 6

Question

I have this shader , this is what the code looks like:

Shader "Hidden/FogOfWar"
{
    Properties
    {
        _MainTex ("Main Texture", 2D) = "white" {}
        _SecondaryTex ("Secondary Texture", 2D) = "white" {}
    }
    SubShader
    {
        Tags
        {
            "Queue" = "Transparent+1" //  makes it sort using sorting layer and not default to z value
        }
        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

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

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                return o;
            }

            sampler2D _MainTex;
            sampler2D _SecondaryTex;

            fixed4 frag (v2f i) : SV_Target
            {
                fixed4 col = tex2D(_MainTex, i.uv);
                col.a = 1 - col.r;
                return fixed4(0,0,0,col.a);
            }
            ENDCG
        }
    }
}

I am trying to implement fog of war for a top down isometric game using this shader, it kinda works, this is how the looks like when rendered(I have a game object with completely red sprite to reveal area, and my input material is completely black):

Now I want to implement the same using shader graph this is how my shader graph looks like:

But I can't get it to work, i.e. it doesn't reveal the area I want it to reveal i.e.

PS: I realized if I use the non-shader graph shader on the reveal area and have the transperency to default it works(not sure why), i.e.

Shader "Hidden/FogOfWar"
{
    Properties
    {
        _MainTex ("Main Texture", 2D) = "white" {}
        _SecondaryTex ("Secondary Texture", 2D) = "white" {}
    }
    SubShader
    {
        Tags
        {
            "Queue" = "Transparent" // need this not to be +1 for shader graph to work
     }

I would only like to rely on the shader genereted by the shader graph though

Surely the textures would be the camera view of the map in full and a multi colour texture with your red circles of revealed areas? — BugFinder
– BugFinder, Commented Jan 11 at 18:52

Snedden27 · Accepted Answer · 2025-01-12 06:22:22Z

0

So was following this post: https://discussions.unity.com/t/zwrite-in-shader-graph/752538/23

It looks i have to turn on zWrite , this is how I did it: looks like things are working as expected now.

answered Jan 12 at 6:22

Snedden27

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