Get the image URL of the dragon/scry you're previewing the accent on. Put this in the first text field.
Select the skin you want from the dropdown.
Optional: get a transparent apparel URL. to do this, go to the dressing room, import the apparel you want to preview, and add a Marva's Invisibility Cloak at the very bottom. Then copy that image URL.
This previewer does not automatically add primal or multigaze eyes. If I can figure out how to add how to add eye masks in the future I will add them in.
**For best results please use a dragon scry with no eye type that clips over the lineart.**