Cache Protocol
From PowerUI
The cache:// protocol was used with the static ImageCache class (scripting). It's been depreciated in favour of just using anElement.image=theTexture instead. It lets you name a Texture (either a RenderTexture or a Texture2D) and display it on the UI:
// Texture2D aTexture;
ImageCache.Add("myTexture",aTexture);
<!-- Here's how you display it -->
<img src='cache://myTexture'/>