Okay you're going to love thisd if you haven't already tried it.

The add-in option has a thing called 'convert image to 3d'.
And it does !

You have to save your picture - anything from a photo to a simple shape in a png or bmp file. jpg/jpeg does not currently work. But any photo program from paint on up will save in png format.
It then converts to a 3d stl file and re-imports the file for tweaking. Play with the z xis scaling to get it the height you want and print. Currently trying a koala head (windows sample pics) at 1mm height and 0.2 layer.
Looked good in the preview.

And this works with ANY picture.

I'll be making dog head coasters later :-)