Pragma target 3.0 not fixing "Too many interpolators"

Graphics Shaders & Materials
1

Hi all,

I’m getting the error “Too many texture interpolators would be used for ForwardBase pass (11 out of max 10) at line 21”. My understanding is that #pragma target 3.0 should fix this, am I wrong?

I’m using 2017.4.3f1
I can’t really share code but here’s the structure:

Shader "Custom/New Shader" {
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        //etc...
    }
SubShader {
        Tags { "RenderType"="Opaque" }
        LOD 200
        CGPROGRAM

        #pragma surface surf Standard fullforwardshadows

        #pragma target 3.0

        struct Input {
            float2 uv_MainTex;
            //etc...
        };

        float _Glossiness;
        //etc...  

        UNITY_INSTANCING_BUFFER_START(Props)

        UNITY_INSTANCING_BUFFER_END(Props)

            void vert(inout appdata_full v, out Input o)
        {
            //Stuff
        }

        void surf (Input IN, inout SurfaceOutputStandard o) {
            //Stuff
        }

        ENDCG
    }
    FallBack "Diffuse"
}

I guess that’s impossible to debug, but my question really just is whether “#pragma target 3.0” should be fixing that error.

Thanks in advance!

2

#pragma target 3.0 sets the requirements to 10 interpolators. If you’re using more, it will give you this error.
Your struct Input has too many fields. Try packing those together.

3

Ah right, thanks very much!