Alpha Map with Sun

[klmsc]

Hi. I purchased Corona by the month not long ago and am just now getting used to it. I have a small problem though. I'm rendering an exterior scene and am trying to use a tree line alpha mapped to a plane that blocks the Corona sun, so hopefully it will show the shadows of the leaves and such.

The problem is it's just showing the shadow as one large plane on the ground. Is there a trick to using an alpha map in Corona to do that? Any advice or direction you could give me to learn more about how to do this effect? Thank you.

Attached is the image I'm trying to use.

[klmsc]

Never mind guys. I figured it out. I have an override material on the scene, but I didn't exclude my tree shadow plane. I excluded it, and boom. It works.