[Tweening multiple CSS3 background images]

Hi all,

This is my first question as I am a long time lurker of this forum..

 

In CSS3 we can use multiple background  as described in this CSS snippet:

#some-image {
   background-image: url("img1.png"), url("img2.png");
   background-position: 0px 0px, center;
}

However, after digging the documentation I cannot find anything to tween one of the multiple background. I can tween a background image if the HTML element only using  single background. With multiple background, i have no luck..

 

Do I miss something here? Or does GSAP not support this feature yet?

 

Many thanks for the effort..