Blend touching triangle textures

Unity Engine
1

Hello! I made a project where a voxel terrain system uses a specific vertex color to determine the texture used for that voxel. This works fine - but has very sharp edges and looks quite bad. I was wondering if there’s any way to make the edges blend together.

Thanks! Current shader code below:

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

Shader"Triplanar" {
  Properties {
    _ArrTex("TextureArr", 2DArray) = "" {}
    scale("Scale", Float) = 1
    _brightness("Texture Brightness", Float) = 1
    _SpecColor("Specular Material Color", Color) = (1, 1, 1, 1)
    _Shininess("Shininess", Float) = 10
  }
  SubShader {
    Pass {
      Tags { "LightMode" = "ForwardBase" }

CGPROGRAM
#pragma multi_compile_fwdbase
#pragma vertex vert
#pragma fragment frag
#include"UnityCG.cginc"
#include"AutoLight.cginc"

struct v2f
{
    float3 worldPos : TEXCOORD0;
    half3 worldNormal : TEXCOORD1;
    float4 pos : SV_POSITION;
    float4 color : COLOR;
        LIGHTING_COORDS(2, 3)
};

v2f vert(float4 vertex : POSITION, float3 normal : NORMAL, float4 color : COLOR)
{
    v2f o;
    o.color = color;
    o.pos = UnityObjectToClipPos(vertex);
    o.worldPos = mul(unity_ObjectToWorld, vertex).xyz;
    o.worldNormal = UnityObjectToWorldNormal(normal);
    TRANSFER_VERTEX_TO_FRAGMENT(o);
    return o;
}

float scale;
float _brightness;
float4 _SpecColor;
float _Shininess;

UNITY_DECLARE_TEX2DARRAY(_ArrTex);

fixed4 frag(v2f i) : SV_Target
{

        //////////////////////////////////   TRIPLANAR   ////////////////////////////////

    half texid = i.color.x * 255;
    half3 norm = i.worldNormal;
        // in wNorm is the world-space normal of the fragment
    vector blending = abs(float4(norm.x, norm.y, norm.z, 0));
    blending = normalize(max(blending, 0.00001)); // Force weights to sum to 1.0
    float b = (blending.x + blending.y + blending.z);
    blending /= vector(b, b, b, 1);

    float4 xaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.y, i.worldPos.z, texid) * scale);
    float4 yaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.x, i.worldPos.z, texid) * scale);
    float4 zaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.x, i.worldPos.y, texid) * scale);

        // in float scale
    float4 tex = xaxis * blending.x + yaxis * blending.y + zaxis * blending.z;

    tex = tex * _brightness;

        //////////////////////////////      LIGHTING     ////////////////////////////////

    float attenuation = LIGHT_ATTENUATION(i);
    tex = tex * attenuation;

        ////////////////////////////////////////////////////////////////////////////////////

    return tex;

}
      ENDCG
    }

    Pass {

Blend one one

      Tags { "LightMode" = "ForwardAdd" }

CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include"UnityCG.cginc"
#pragma multi_compile_fwdadd_fullshadows
#include"AutoLight.cginc"

struct v2f
{
    float3 worldPos : TEXCOORD0;
    half3 worldNormal : TEXCOORD1;
    float4 pos : SV_POSITION;
    float4 color : COLOR;
        LIGHTING_COORDS(2, 3)
};

v2f vert(appdata_base v, float4 vertex : POSITION, float3 normal : NORMAL, float4 color : COLOR)
{
    v2f o;
    o.color = color;
    o.pos = UnityObjectToClipPos(vertex);
    o.worldPos = mul(unity_ObjectToWorld, vertex).xyz;
    o.worldNormal = UnityObjectToWorldNormal(normal);
    TRANSFER_VERTEX_TO_FRAGMENT(o);
    return o;
}

float scale;
float _brightness;
float4 _SpecColor;
float _Shininess;

      UNITY_DECLARE_TEX2DARRAY(_ArrTex);

fixed4 frag(v2f i) : SV_Target
{

        //////////////////////////////////   TRIPLANAR   ////////////////////////////////

    half texid = i.color.x * 255;
    half3 norm = i.worldNormal;
        // in wNorm is the world-space normal of the fragment
    vector blending = abs(float4(norm.x, norm.y, norm.z, 0));
    blending = normalize(max(blending, 0.00001)); // Force weights to sum to 1.0
    float b = (blending.x + blending.y + blending.z);
    blending /= vector(b, b, b, 1);

    float4 xaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.y, i.worldPos.z, texid) * scale);
    float4 yaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.x, i.worldPos.z, texid) * scale);
    float4 zaxis = UNITY_SAMPLE_TEX2DARRAY(_ArrTex, float3(i.worldPos.x, i.worldPos.y, texid) * scale);

        // in float scale
    float4 tex = xaxis * blending.x + yaxis * blending.y + zaxis * blending.z;

    tex = tex * _brightness;

        //////////////////////////////      LIGHTING     ////////////////////////////////

    float attenuation = LIGHT_ATTENUATION(i);
    tex = tex * attenuation;

        ////////////////////////////////////////////////////////////////////////////////////

    return tex;

}

      ENDCG

    }

  }

Fallback"VertexLit"

}
2

bump?