Can we see a screeny of what your problem is?
/*SHAMELESS PLUG
Also, in case you wanted it for future use, here is an action I made that creates a custom iris texture automaticly:
https://share.studio.adobe.com/axAsse...26allprods%3D0
END SHAMELES PLUG */
Also, have you tried a simple planar map?
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com