How to blend UV seams HLSL

I wanted to create a shader without texture tiling. And i created a simple shader which contains dividing the UV into blocks and rotating them. But i cannot figure out how to create a blend between the edges of the UV blocks...

Here is my code:

Shader "Custom/Blend_4_test"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _TileCount("Tile Count", Range(2.0, 100.0)) = 4
        _TileCountInside("Tile Count Inside", Range(1.0, 10.0)) = 1
        _RotateAngle("Rotate Angle", Float) = 45.0
        _RotateNoise("Rotate Noise", Float) = 20.0

        [Enum(Texture,0,Checker,1)] _ViewMode("View Mode", Int) = 1
    }
    SubShader {
        Pass {
            CGPROGRAM
            #pragma vertex vert_img
            #pragma fragment frag

            #include "UnityCG.cginc"
            #include "../Libraries/Helper.cginc"

            sampler2D _MainTex;

            half _TileCount;
            half _TileCountInside;
            half _RotateAngle;
            half _RotateNoise;
            half _Mitigation;

            int _ViewMode;

            half Hash21(half2 p) {
                p = frac(p*half2(123.34, 456.21));
                p += dot(p, p+45.32);
                return frac(p.x*p.y);
            }

            half2 getNoise(half2 uv) {
                half2 st = uv * max(_TileCount, 1);
                half2 ipos = floor(st);
                return rand2(ipos, _RotateNoise);
            }

            int getChecker(half2 uv) {
                half2 ipos = sin(uv * _TileCountInside * 6.2831);
                return ipos.x * ipos.y > 0.;
            }

            half4 frag(v2f_img i) : SV_Target
            {
                half2 noise = getNoise(i.uv);

                i.uv *= _TileCount;

                half2 uvRotationPivot = (half2)0.5;
                i.uv -= floor(i.uv);
                i.uv -= uvRotationPivot;
                i.uv = mul(rot(radians(_RotateAngle * Hash21(noise))), i.uv);
                i.uv += uvRotationPivot;

                return _ViewMode ? getChecker(i.uv) : tex2D( _MainTex, i.uv * _TileCountInside );
            }
            ENDCG
        }
    }
}

Here is an example output: https://i.stack.imgur.com/J8ruT.png