drecon-unity/Assets/8_Scripts/2_General/DissapearShader.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DissapearShader : MonoBehaviour
{
	public Material m_Material;
	public float m_HeightThresholdMax;
	public float m_HeightThresholdMin;
	private float m_InitalHeight;
	void Awake(){
		m_InitalHeight = this.transform.position.y;
		Debug.Log(m_InitalHeight);
	}
    void Update(){
		float value = Mathf.Clamp( Remap(this.transform.position.y, m_HeightThresholdMin, m_HeightThresholdMax, 1, 0), 0, 1 );
		float slerpValue = Mathf.Lerp(1, 0, Mathf.SmoothStep(1, 0, value));
		m_Material.SetFloat("_DissapearValue", slerpValue);
	}
	public float Remap (float value, float from1, float to1, float from2, float to2) {
    	return (value - from1) / (to1 - from1) * (to2 - from2) + from2;
	}	
}