Changing the preview image?

So, I have a bunch of custom ScriptableObject assets, and when I change the project view to show larger preview icons, I only get the default asset image. However I'd rather show something else to give me a better overview. What's the best way to change this?

 

Hey there Martin. I've got a whole bunch of custom icons and gizmos I use for my custom components so I've dabbled quite a bit in what you're talking about. I'm just a little bit confused on what exactly is happening on your side. Are you saying that you are able to set the icon and it reverts to the original C# icon when increasing the icon size in the Project tab?

Otherwise, I assume you've set up your icons using the drop down window on the Icon Object in the Inspector tab. Looks like this:


If you click on "Other..." it will open up the standard texture browser and you can pick from anything in there.

Hope that helps a bit.

 

So, I've fiddled with this a bit, and using RenderStaticPreview to show an image from within the asset, and now I have this:



It does work but doesn't seem to update all the preview images.

Here's the code:

Code (CSharp):

1.  
2.     public override Texture2D RenderStaticPreview(string assetPath, Object[] subAssets, int width, int height) {
3.         Card targetCard = target as Card;
4.  
5.         if (targetCard == null || targetCard.image == null || targetCard.image.texture == null)
6.             return null;
7.  
8.         var preview = AssetPreview.GetAssetPreview(targetCard.image.texture);
9.  
10.         if (preview == null)
11.             return null;
12.  
13.         Texture2D cache = new Texture2D(width, height);
14.         EditorUtility.CopySerialized(preview, cache);
15.  
16.         return cache;
17.     }

Your solution doesn't seem to work, since it's only for c# assets, not .asset scriptable objects.

 

For anyone looking for the answer, Democide's solution works but the previews are generated when the asset is *created*. So in that case to fix the missing preview images the assets would need to be saved again.

 

Do you have a fix for that?