[Fixed] Shader disappears at certain viewing angles

Unity Engine
1

I’m having a very odd problem here, a rim light shader I’m writing will disappear at certain viewing angles unless it’s rendering over the skybox (in which case it’s visible from all angles). The shader is transparent, but the issue persists even if I make it completely opaque.


Shader "Custom/RimLitTransparent"
{
    Properties
    {
        _Color("Color", Color) = (1,1,1,1)
        _RimPower("Rim Power", Range(0.5,8.0)) = 3.0
    }
    SubShader
    {
        Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" }
        LOD 100
        ZWrite off

        CGPROGRAM
        #pragma surface surf Unlit alpha
        #pragma multi_compile_fog
       
        struct Input
        {
            float3 viewDir;
        };

        float4 _Color;
        float _RimPower;
           
        void surf(Input IN, inout SurfaceOutput o)
        {
            half rim = 1.0 - saturate(dot(normalize(IN.viewDir), o.Normal));
            o.Albedo = _Color.rgb;
            o.Alpha = _Color.a + pow(rim, _RimPower);
        }

        fixed4 LightingUnlit(SurfaceOutput s, fixed3 lightDir, fixed atten)
        {
            fixed4 c;
            c.rgb = s.Albedo;
            c.a = s.Alpha;
            return c;
        }

        ENDCG
    }
}
2

Shader for the car is Unlit/Textured, Shader for the road is a custom vertex color shader.

3

I fixed it by switching to a different shader and then back again.

4

You were hitting this issue:

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