I've been working about an hour several days a week on this Nativity project I started last month.
I've been using newsprint to trace a template of each piece. Then cutting it out of the fabric.
You can see I have the colored copy of the original underneath my interfacing. It's not necessary, but can be helpful at times. I also have a smaller copy of the the stained glass which is what I really use for color reference.
I iron my fabric pieces onto the interfacing and that holds it all in place.
Look how the stars shine in the sky.
Everything will be outlined with black bias. That will be the stained glass.
I will also do thread work especially around the star in the sky.
It is quite a challenge, but fun.