Hacked together triplanar shader for custom particle effect in https://youtu.be/FGTpz3O8PnQ

CrackedEarthShader.shader

// Upgrade NOTE: replaced '_World2Object' with 'unity_WorldToObject'

Shader "Custom/CrackedEarthShader" {
	Properties {
		_Color ("Color", Color) = (1,1,1,1)
		_MainTex ("Albedo (RGB)", 2D) = "white" {}
		_Glossiness ("Smoothness", Range(0,1)) = 0.5
		_Metallic ("Metallic", Range(0,1)) = 0.0
		_TriPlanarScale ("Triplanar Scale", Float) = 5
		_EmissionStrength ("Emission", Float) = 1
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		// Physically based Standard lighting model, and enable shadows on all light types
		#pragma surface surf Standard fullforwardshadows

		// Use shader model 3.0 target, to get nicer looking lighting
		#pragma target 3.0

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
			float3 worldPos;
			float3 worldNormal;
		};

		half _Glossiness;
		half _Metallic;

		fixed4 _Color;
		float _EmissionStrength;

		float _TriPlanarScale;

		// Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
		// See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
		// #pragma instancing_options assumeuniformscaling
		UNITY_INSTANCING_CBUFFER_START(Props)
			// put more per-instance properties here
		UNITY_INSTANCING_CBUFFER_END
 
        

		void surf (Input IN, inout SurfaceOutputStandard o) {
			// Albedo comes from a texture tinted by color
			float2 uv = float2(0, 0);
			float3 normal = normalize(mul(unity_WorldToObject, float4(IN.worldNormal, 0.0)));
			float x = abs(normal.x);
			float y = abs(normal.y);
			float z = abs(normal.z);

			float3 pos = IN.worldPos * _TriPlanarScale;

			fixed4 xTex = tex2D(_MainTex, pos.yz);
			fixed4 yTex = tex2D(_MainTex, pos.xz);
			fixed4 zTex = tex2D(_MainTex, pos.xy);

			fixed4 color = xTex * x + yTex * y + zTex * z;

			o.Albedo = color.rgb;
			o.Emission = color.rgb * _EmissionStrength;
			// Metallic and smoothness come from slider variables
			o.Metallic = _Metallic;
			o.Smoothness = _Glossiness;
			o.Alpha = color.a;
		}
		ENDCG
	}
	FallBack "Diffuse"
}