unityでskyboxを動的に変化させたい

unityのskyboxを昼→夕方→夜と動的に変化させたいです。
1.【Unity】IBLの背景（SkyBox）を動的に変更する
2.UnityのSkyboxを動的に弄る
1.のページのように瞬間的に変わるのではなく2.のようにアセットストアにあった昼夕夜のスカイボックスに徐々に変化させたいと考えています。

探したところ下記のような動画をみつけ、shaderを動的に変更すればいいことが分かったのでshader forgeで作ってみてるのですがうまくいきません。
Unityで朝→昼→夜を表現

どのような調整、もしくは他の方法があれば教えてください。

行動規範の内容に同意します

回答1件

HLSL
1Shader "Skybox/Blended" {
2	Properties {
3		_Tint("Tint Color", Color) = (.5, .5, .5, .5)
4		_Blend("Blend", Range(0.0,1.0)) = 0.5
5		_FrontTex("Front (+Z)", 2D) = "white" {}
6		_BackTex("Back (-Z)", 2D) = "white" {}
7		_LeftTex("Left (+X)", 2D) = "white" {}
8		_RightTex("Right (-X)", 2D) = "white" {}
9		_UpTex("Up (+Y)", 2D) = "white" {}
10		_DownTex("Down (-Y)", 2D) = "white" {}
11		_FrontTex2("2 Front (+Z)", 2D) = "white" {}
12		_BackTex2("2 Back (-Z)", 2D) = "white" {}
13		_LeftTex2("2 Left (+X)", 2D) = "white" {}
14		_RightTex2("2 Right (-X)", 2D) = "white" {}
15		_UpTex2("2 Up (+Y)", 2D) = "white" {}
16		_DownTex2("2 Down (-Y)", 2D) = "white" {}
17	}
18
19	SubShader {
20		Tags { "Queue" = "Background" }
21		Cull Off
22		Fog { Mode Off }
23		Lighting Off
24		Color[_Tint]
25
26		Pass {
27			SetTexture[_FrontTex] { combine texture }
28			SetTexture[_FrontTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
29		}
30		Pass {
31			SetTexture[_BackTex] { combine texture }
32			SetTexture[_BackTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
33		}
34		Pass {
35			SetTexture[_LeftTex] { combine texture }
36			SetTexture[_LeftTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
37		}
38		Pass {
39			SetTexture[_RightTex] { combine texture }
40			SetTexture[_RightTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
41		}
42		Pass {
43			SetTexture[_UpTex] { combine texture }
44			SetTexture[_UpTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
45		}
46		Pass {
47			SetTexture[_DownTex] { combine texture }
48			SetTexture[_DownTex2] { constantColor(0,0,0,[_Blend]) combine texture lerp(constant) previous }
49		}
50	}
51
52	Fallback "Skybox/6 Sided", 1
53}

csharp
1using System.Collections;
2using UnityEngine;
3
4public class BlendSkybox : MonoBehaviour
5{
6    [SerializeField] Material _skyMat = default;
7    [SerializeField, Range(0f, 1f)] float _rate = 0.05f;
8    Coroutine _coroutine = default;
9    Material _runtimeMaterial = default;
10
11    public void FadeSkybox()
12    {
13        if (_coroutine == null)
14        {
15            _runtimeMaterial = Instantiate(_skyMat);
16            RenderSettings.skybox = _runtimeMaterial;
17            _coroutine = StartCoroutine(FadeSkyboxRoutine(_rate));
18        }
19    }
20
21    IEnumerator FadeSkyboxRoutine(float rate)
22    {
23        float blend = 0f;
24
25        while (blend < 1)
26        {
27            _runtimeMaterial.SetFloat("_Blend", blend);
28            blend += rate;
29            yield return null;
30        }
31
32        _runtimeMaterial.SetFloat("_Blend", 1);
33        Debug.Log("Fade Finished.");
34        _coroutine = null;
35    }
36}