Static and Moving Depth Sort Behaviours for Unity

DynamicDepthSort.cs

using UnityEngine;

namespace Islands {
	[ExecuteInEditMode]
	[RequireComponent(typeof(SpriteRenderer))]
	public class DynamicDepthSort: MonoBehaviour {

		/// <summary>
		/// A reference to the game object’s sprite renderer component.
		/// </summary>
		private SpriteRenderer spriteRenderer;

		// Start is called before the first frame update
		void Start() {
			// Get a reference to the sprite renderer component
			spriteRenderer = GetComponent<SpriteRenderer>();
		}

		// Update is called once per frame
		void Update() {
			// Set this game object’s sorting order based on its y-position. This will make
			// objects in the back show behind objects in the front.
			// See: https://breadcrumbsinteractive.com/two-unity-tricks-isometric-games/
			spriteRenderer.sortingOrder = 0 - (int)transform.position.y;
		}

	}
}

StaticDepthSort.cs

using UnityEngine;

namespace Islands {
	[ExecuteInEditMode]
	[RequireComponent(typeof(SpriteRenderer))]
	public class StaticDepthSort: MonoBehaviour {

		/// <summary>
		/// A reference to the game object’s sprite renderer component.
		/// </summary>
		private SpriteRenderer spriteRenderer;

		// Start is called before the first frame update
		void Start() {
			// Get a reference to the sprite renderer component
			spriteRenderer = GetComponent<SpriteRenderer>();
			// Set this game object’s sorting order based on its y-position. This will make
			// objects in the back show behind objects in the front.
			// See: https://breadcrumbsinteractive.com/two-unity-tricks-isometric-games/
			spriteRenderer.sortingOrder = 0 - (int)transform.position.y;
		}

	}
}