Adding shadows to a shader

Unity Engine
1

Hi everyone,

I have a simple grayscale shader, which does not receive shadows.
I’ve tried a few solutions I found with no success.
Does someone know how my shader can take into account shadows?

Here it is :

Shader "Custom/GreyScale" {
    Properties{
        _MainTex("Texture", 2D) = "white" { }
        _Factor("Factor", Range(0, 1.0)) = 0.6
    }
        SubShader{
            Tags { "RenderType" = "Opaque" }
            LOD 150
            Pass {

        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag

        #include "UnityCG.cginc"

        sampler2D _MainTex;
        float _Factor;

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

        float4 _MainTex_ST;

        v2f vert(appdata_base v)
        {
            v2f o;
            o.pos = UnityObjectToClipPos(v.vertex);
            o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
            return o;
        }

        half4 frag(v2f i) : COLOR
        {
            half4 texcol = tex2D(_MainTex, i.uv);
            texcol.rgb = dot(texcol.rgb, float3(0.3, 0.59, 0.11)) * _Factor;
            return texcol;
        }
        ENDCG

            }
    }
        Fallback "Diffuse"
}

Thanks

2

Hi,

Did you check the manual? (Vertex and fragment shader examples)

There’s a section called “Receiving shadows”.

It’s almost a step by step guide on how to add basic shadows to a vert/frag shader.

If you get stuck you can ask for more help.