HELP! I need to convert .S3D to .STL

[curious aardvark]

is matter control a slicer or modelling program ?
https://www.instructables.com/id/Adv...ter-generator/
here's an openscad guide to making your own.

And yes this is mac friendly (more than I am lol)

ALL the software I used for this project are free and Open-source and are multi platforms (Windows, Linux, Mac and more)

Hmm, I'll give this a go.

Inkscape isn't the easiest program to get a hang of - I started using it about a year ago when i got my k40 laser cutter and I reckon - while I'm still no expert, I can usually do what I want to do with it now.
Openscad I've been using for about 7 years - and, no I'm no expert in that either :-)
VBut I can Always do what i wnat to - and in the rare occasions these days when I either can't work out how to do something - or am just not goodf enough at mathe. There is ALWAYS someone somewhere who's already done it and published the script.

Example I wanted to put some text on the outside of a large cylinder the other day. Pretty much worked out how to do it, and then went and found a script that had already done it and all I needed to do was add in the text and cylinder dimensions and job done.

The beauty of openscad script is that you can copy and paste them into any script and gai the same functionality.
So and spherical or cylindrical thing I make in future - will have my 'logo'.

The walk through look pretty comprehensive and should let you import almost any image and turn it into a cookie cutter.

I'm going to give it a go :-)