Such a beautiful execution of the clamshell technique. I never would have thought of working the dark mica in oil into the design. Good job! A couple of hints for ya...powdered sugar instead of granulated (dissolves completely), and tape or draw the boundaries for your mold before you film (to guide you in keeping it in the right place during the filming).
Thanks! I'll have to look into powdered sugar... only, does the cornstarch in it cause issues? I have my area taped off where I know it'll be in frame, but that mold is so long it doesn't fit in my area haha!