[Solved]Can't update color in GradientSky on post process volume by script

Hello community,

In HDRP's Volume component, I want to lerp the color in gradient sky by script.

I have set the UpdateMode to "realtime" and the Update Period to "0",

and here is my script:

Code (CSharp):

1.   public GradientSky daySky;
2.     public Volume vol;
3.  
4.     void Start(){
5.         vol.profile.TryGet(out daySky);
6.     }
7.  
8.     void Update(){
9.    
10.          daySky.top.value = Color.Lerp(Color.white, Color.black, (Mathf.Sin(Time.time * 0.4f) + 1f) / 2f);
11.  
12.      }

I can see the "top color" is update in the inspector, but in the game scene nothing happen

(PS: Update. The issue has solved when I update the HDRP version to 7.51)

 

Hi,

This is from my snippets I've written when I was testing HDRP, should work:
(Attach it to an object with your Gradient Sky, it should then change the colors of the Gradient Sky when your enter the play mode.)

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Rendering;
3. using UnityEngine.Rendering.HighDefinition;
4.  
5. public class AccessVolumeOverrideSky : MonoBehaviour
6. {
7.     VisualEnvironment visualEnvironment;
8.     GradientSky gradientSky;
9.  
10.     void Awake()
11.     {
12.         Volume volume = gameObject.GetComponent<Volume>();
13.         VisualEnvironment tempVis;
14.  
15.         if (volume.profile.TryGet<VisualEnvironment>(out tempVis)) {
16.             visualEnvironment = tempVis;
17.         }
18.  
19.         GradientSky tempGradSky;
20.         if (volume.profile.TryGet<GradientSky>(out tempGradSky)) {
21.             gradientSky = tempGradSky;
22.         }
23.  
24.         // Set the sky type
25.         visualEnvironment.skyType.value = (int)SkyType.Gradient;
26.  
27.         // Set the sky parameters
28.         gradientSky.top.value = Color.red;
29.         gradientSky.middle.value = Color.green;
30.         gradientSky.bottom.value = Color.blue;
31.         gradientSky.gradientDiffusion.value = 2.0f;
32.     }
33. }

EDIT: Misread your message a bit, but it should be possible to update the gradient values in Update too, just try this, should work too:

Code (CSharp):

1. void Update()
2.     {
3.         gradientSky.middle.value = new Color(
4.             Mathf.Sin(Time.time),
5.             Mathf.Sin(Time.time),
6.             Mathf.Sin(Time.time)
7.         );
8.     }

My sky had Update Mode set to On Demand.

 

Thanks for your reply ! I think it's a bug on the older hdrp version. The issue has solved when I update the HDRP version from 3.31 to 7.51)