Look at those sideburns, what a character to sculpt, indeed!
Isaac Asimov is one of my all-time favorite authors. I'm still working on this bust, but decided to publish it anyway since I think up to this point the likeness has been sufficiently achieved.
View it on Sketchfab.
The glasses can be printed separately and then glued to the bust.
The file is released under Attribution - Non-Commercial - Share Alike license.
If you're interested in supporting me in sculpting more great scientists, check out my Patreon page.