[Canceled question] Unlit shader doesn't cast or recieve shadows

Unity Engine
1

How could I make it do so?

2

Found some resources on casting shadow, but non on receiving. Only old code that doesn’t work

3

Hi @trsh ,
It might be worth spending a bit more time with the Editor and Inspector panel, you can do both on the object level if you use built-in render pipeline; see image below. Or do you have some specific reason you need to do it in a shader?

5602777--579562--receiveshadows_castshadows_off.png

4

This options have no effect on Unlit shader

5

Put some Shader together, but doesn’t receive shadows :frowning:

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

        Pass
        {
            Tags{ "LightMode" = "UniversalForward" }

            CGPROGRAM

            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog
            //#pragma fullforwardshadows
            #pragma multi_compile_fwdbase

            #include "UnityCG.cginc"
            #include "AutoLight.cginc"

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

            struct v2f
            {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
                LIGHTING_COORDS(0, 1)
            };

            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);
                TRANSFER_VERTEX_TO_FRAGMENT(o);
                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);

                float atten = LIGHT_ATTENUATION(i);
                return col * atten;
            }
            ENDCG
        }
    }

    Fallback "VertexLit"
}
6

Oh I didn’t notice it was unlit you were talking about. But you want that material to be able to receive shadow and cast shadow? I thought it was the opposite (no shadow, no shadow casting.)

7

Yes receive and cast:

My current code. Compiles with universal pipeline, but still object gets no shadows :frowning:

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

        Pass
        {
            Tags{ "LightMode" = "UniversalForward" }

            CGPROGRAM

            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
            #include "Lighting.cginc"

            #pragma multi_compile_fwdbase// nolightmap nodirlightmap nodynlightmap novertexlight
            #include "AutoLight.cginc"

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

            struct v2f
            {
                float2 uv : TEXCOORD0;
                //UNITY_FOG_COORDS(1)
                SHADOW_COORDS(1)
                float4 vertex : SV_POSITION;                               
                fixed3 diff : COLOR0;
                fixed3 ambient : COLOR1;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;

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

                //UNITY_TRANSFER_FOG(o,o.vertex);
               
                half3 worldNormal = UnityObjectToWorldNormal(v.normal);
                half nl = max(0, dot(worldNormal, _WorldSpaceLightPos0.xyz));
                o.diff = nl * _LightColor0.rgb;
                o.ambient = ShadeSH9(half4(worldNormal, 1));
               
                TRANSFER_SHADOW(o)

                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);

                fixed shadow = SHADOW_ATTENUATION(i);
                fixed3 lighting = i.diff * shadow + i.ambient;

                col.rgb *= lighting;

                return col;
            }
            ENDCG
        }

        // shadow casting support
        UsePass "Legacy Shaders/VertexLit/SHADOWCASTER"
    }
}
8

Opening a new thread I got to the problem point