[Fixed] Weird Issue with shadows with Vert Frag shader I made

Unity Engine
1

Hello guys!

I’ve been writting my own shader for my game, this is how it looks:

  Shader "Planet Generator/ShadowTest" {
        Properties {
            _Tex0 ("Tex 0", 2D) = "white" {}
        }
        SubShader {
        Tags { "RenderType" = "Opaque" }
            Pass {
            Tags { "LightMode" = "ForwardBase" }
                Blend SrcAlpha OneMinusSrcAlpha
                    CGPROGRAM
                    #pragma vertex vert
                    #pragma fragment frag
                    #include "UnityCG.cginc"
                   
                    #pragma target 3.0
                   
                    #pragma multi_compile_fwdbase
                    #include "AutoLight.cginc"
                   
                    sampler2D _Tex0;
                    uniform float4 _Tex0_ST;
          
                    struct v2f {
                        float4 pos : SV_POSITION;
                        float2 uv : TEXCOORD0;
                        float4 col : COLOR;
                        LIGHTING_COORDS(1,2)
                    };
                  
                    v2f vert (appdata_base vInput) {
                        v2f OUT;
                        OUT.pos = mul (UNITY_MATRIX_MVP, vInput.vertex);
                        OUT.uv = TRANSFORM_TEX(vInput.texcoord, _Tex0);
                        OUT.col = length(vInput.vertex);
                        TRANSFER_VERTEX_TO_FRAGMENT(OUT);
                        return OUT;
                    }
                  
                    half4 frag (v2f fInput) : COLOR {
                        float attenuation = LIGHT_ATTENUATION(fInput);
                        half4 c0 = tex2D (_Tex0, fInput.uv);
    
                        return c0 * attenuation;
                    }
                ENDCG
            }
        }
        Fallback "VertexLit"
    }

This is a simple vert frag shader which is supposed to be affected by lights, objects are casting lights but for some unknown reason I’m getting this issue:

Shaded areas are looking like that when directional light intensity is > 0 …

I would love to have some help! Thankyou!

2

Some help pls!