Question How can I add support for more than 4 Textures in a custom Terrain Shader

Hello! I have this custom terrain shader that works great in the standard render pipeline, but doesn't support more than 4 terrain textures (after 4 they just don't show up). Is there an easy way to add the multi-pass support that doesn't involve invoking the built-in terrain shader splat/cgincs?

Code (CSharp):

1. Shader "Tome/Tome Terrain"
2. {
3.     Properties
4.     {
5.         [Header(Greyscale Area)]
6.         _GreyMin ("Grey Min", Range(0,1)) = 0.05
7.         _GreyMax ("Grey Max", Range(0,1)) = 0.5
8.     }
9.     SubShader
10.     {
11.         Tags { "RenderType"="Opaque" "TerrainCompatible"="True"}
12.         LOD 200
13.  
14.         CGPROGRAM
15.         #pragma surface surf Lambert fullforwardshadows
16.         #pragma target 3.0
17.         #include "TomeGrey.cginc"
18.  
19.         //Splat Map
20.         sampler2D _Control;
21.         // Splat Textures
22.         sampler2D _Splat0, _Splat1, _Splat2, _Splat3;
23.         float4 _Splat0_ST, _Splat1_ST, _Splat2_ST, _Splat3_ST;
24.         sampler2D _Normal0, _Normal1, _Normal2, _Normal3;
25.         float _NormalScale0, _NormalScale1, _NormalScale2, _NormalScale3;
26.         float _GreyMin, _GreyMax;
27.         struct Input
28.         {
29.             float2 uv_Control;
30.             float3 worldPos;
31.             float3 worldNormal;
32.             INTERNAL_DATA
33.         };
34.  
35.         fixed4 ApplySplats(Input IN, inout SurfaceOutput o)
36.         {
37.             fixed4 splatControl = tex2D(_Control, IN.uv_Control);
38.             fixed4 col = splatControl.r * tex2D (_Splat0, IN.uv_Control * _Splat0_ST.xy);
39.             col += splatControl.g * tex2D(_Splat1, IN.uv_Control * _Splat1_ST.xy);
40.             col += splatControl.b * tex2D (_Splat2, IN.uv_Control * _Splat2_ST.xy);
41.             col += splatControl.a * tex2D (_Splat3, IN.uv_Control * _Splat3_ST.xy);
42.            
43.             o.Normal = splatControl.r * UnpackNormalWithScale(tex2D(_Normal0, IN.uv_Control * _Splat0_ST.xy), _NormalScale0);
44.             o.Normal += splatControl.g * UnpackNormalWithScale(tex2D(_Normal1, IN.uv_Control * _Splat1_ST.xy), _NormalScale1);
45.             o.Normal += splatControl.b * UnpackNormalWithScale(tex2D(_Normal2, IN.uv_Control * _Splat2_ST.xy), _NormalScale2);
46.             o.Normal += splatControl.a * UnpackNormalWithScale(tex2D(_Normal3, IN.uv_Control * _Splat3_ST.xy), _NormalScale3);
47.            
48.             return col;
49.         }
50.  
51.         void surf (Input IN, inout SurfaceOutput o)
52.         {
53.             fixed4 col = ApplySplats(IN, o);
54.            
55.             col = GreyscaleArea(col, IN.worldPos, _Time.y, _GreyMin, _GreyMax);
56.             o.Albedo = col.rgb;
57.             o.Alpha = col.a;
58.         }
59.         ENDCG  
60.     }
61.  
62.     FallBack "Diffuse"
63. }

 

Im running into the same issue with ShaderGraph terrain shaders, @blueteak , did you find a solution? Thanks!!