Animated cookie textures

Just wondering... is there any way to create animated cookie textures?

Cheers,

Jan

 

Not directly, instead you might try creating a script routine that "flipped" cookie textures to create that effect.

 

But if I create a movie texture and apply it to the Cookie property in the Inspector, that would be the same, right? ...because this doesn't work for me.

 

That was my point, I don't believe Movie Textures can be applied as light cookies. Hence the suggestion for you to look at manually flipping through a series of textures yourself. Give it a go and see if it works!

 

Yepp, I will try that... thanks!

 

Light cookie textures have specific requirements IIRC, thus the limitation that I think is there.

 

If any one needs... I wrote a litte script that lets you "animate" a light cookie.

Just put it onto a light, put in a series of different cookieTextures, choose framerate and playback mode and here you go.

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class AnimateCookieTexture : MonoBehaviour {
5.  
6.     public enum AnimMode
7.     {
8.         forwards,
9.         backwards,
10.         random
11.     }
12.  
13.     public Texture2D[] textures;
14.     public float fps = 15;
15.  
16.     public AnimMode animMode = AnimMode.forwards;
17.  
18.     private int frameNr = 0;
19.     private Light cLight;
20.  
21.     void Start () {
22.         cLight = GetComponent(typeof(Light)) as Light;
23.         if (cLight == null)
24.         {
25.             Debug.LogWarning("AnimateCookieTexture: No light found on this gameObject", this);
26.             enabled = false;
27.         }
28.  
29.         StartCoroutine("switchCookie");
30.     }
31.  
32.  
33.  
34.     IEnumerator switchCookie()
35.     {
36.         while (true)
37.         {
38.             cLight.cookie = textures[frameNr];
39.  
40.             yield return new WaitForSeconds(1.0f / fps);
41.             switch (animMode)
42.             {
43.                 case AnimMode.forwards: frameNr++; if (frameNr >= textures.Length) frameNr = 0; break;
44.                 case AnimMode.backwards: frameNr--; if (frameNr < 0) frameNr = textures.Length - 1; break;
45.                 case AnimMode.random: frameNr = Random.RandomRange(0, textures.Length); break;
46.             }
47.         }
48.     }
49.    
50. }
51.  

 

The docs (Light Cookie) are but a short reach away and they state:

1. Enable Border Mipmaps

2. Enable Build Alpha From Grayscale (this way you can make a grayscale cookie and Unity converts it to an alpha map automatically)

3. Set the Texture Format to Alpha 8 Bit


Movie textures don't support those options.

 

Hey can you help me a little. I am trying to get that script to work but i get that error in Unity: Insert a semicolon at the end.

 

Great script DerWoDaSo! I use it for 2.5D game project where you need to animate the shadows on windows

 

Hi there!

9 years after, is there any native way or workaround to render even a simple shader-based cookie for a light - with the specific intent to mimic the irregularities of the flame of a torch?

 

9 years after ... and I stumble upon my own posts again.

You can setup a RenderTexture and use that as cookie which is updated every frame or when ever you need it. I do that for cloud shadows at the moment.

 

@DerWoDaSo , I'm currently trying to do the same (RenderTexture as cookie), but it won't update accordingly, just once when I delete the assigned cookie and re-assign the RenderTexture. When I use the RT in any other way (e.g. in a Material), it works fine.
I tried all the RT's settings, but nothing changed that (tried in 2018.2 with "old" Render Workflow, and in 2018.3 with HDRP).
Do you have any advice? Thanks a lot!

 

This script is awsome and it still works! I wasnt able to get the Render to texture thing working...

THANKS!

 

Thanks DerWoDaSo !
The script works perfectly !

 

Gah, I had a render texture animated as a cookie working beautifully a few versions of Unity ago. Now it doesn't

 

Hey,
I do have the same problem. On objects the animated texture works fine but as a Spotlight Cookie it doesn't move at all. Is there any solution? Working in HDRP 2019.2.1