Sheldon Greenberg


Unlock Your Artistic Potential

Mentorship is the fastest way to go from where you are today, to where you want to be!

Learn How Mentorship Works or join this mentors group below.

Mentoring Emerging Artists
Not sure if you’re an emerging artist? Visit our How It Works page.

MEDIUM: Acrylic | Graphite | Charcoal | Drawing | Graphite | Mixed Media | Oil | Spray Paint
SPECIALTY: ✔ Technique

The paintings are most often represented in a moment of time, and giving the feeling that something is about to or has just happened.

After the Covid pandemic I have began to think more about how our lives have become more isolated even when we come together.

In some of the paintings we see figures involved in there own world, and other works the figures are not represented but a sense of people nearby. The contrast of each frozen moment coming to life. Flat shapes versus detail and finished shapes versus the unresolved areas. Each giving context to the other. 

Artwork by Michaela Hoppe
Artwork by Michaela Hoppe
Artwork by Michaela Hoppe
Artwork by Michaela Hoppe
Artwork by Michaela Hoppe
Artwork by Michaela Hoppe


Listed below are this Mentor’s specialty skills. Join this group if you want to grow in these areas.

Specialty: ✔ Technique 


Studio Setup for Art Production


Color and Composition


Providing Art Critiques


Teaching How to Self Critique


Technique & Demos

Supplies and tools – what to use, where to save, and where to spend

“Mastrius is a perfect balance of accountability, community and fun.
It feels like family. Family that makes you a better you.”

~ Elizabeth, Emerging Artist


select your mentorship group

If the group you’re interested in has a waitlist, you have the option to join another group to get started. When your group opens we can transfer you over.


Artwork by Michaela Hoppe


  • 1993-94  California College of the Arts & Crafts, Oakland, MFA
  • 1985-86  Art Students League, New York
  • 1975-80  San Jose State University, San Jose, BS


2003-present Professor at the Academy of Art University, San Francisco, CA

  • Color and Design
  • Senior Figure Painting
  • Still Life Painting
  • Composition and Painting
  • Mixed Media Drawing and Painting
  • Composition and Abstract Art