What techniques and bricks are used to support the transparent pieces? Can anyone work it out?
I schmoogle searched your picture looking for more reference info, and it says it's named:
"IMGP7842f - 2016 - Glass Staircase Study With Side Shelves" by Deborah Higdon.
Colors are used to help better visualize this masterpiece. Everything that's hidden from camera view on the left side, like the orange 1x1 plates and the red, dark-gray and white corner tiles is just speculation by me.
Her unorthodox use of the transparent garage pieces as steps are both visually striking and cool, but what makes her piece more grande is when we start reverse engineering it, and become even more pleasantly surprised by what we find.
We all know the LEGO system doesn't have top/bottom reverse-studded bricks and plates, so we have to ask ourselves, how'd she connect both sides then?
Then we see how she pins her structure together using a combination of modified studded bricks(red and dark green), which are all held together by a 1x8(reddish-brown) tile and a 2x4(nougat colored) plate, which is very nice!
How she was able to count out the in between plate/brick width of the 1x8 tile is impressive, but what throws me, is BOTH the random use, AND random way she USED the garage pieces for steps. That's cray-cray.
I haven't tested her design in real life. Like most of my designs the final glory is the transition from the digital to the real-life. I want to touch it!! So, for these Steps and Cubbyholes, I can't just yet feel the overall structural integrity to reach her vision of final glory.
And finally, I'm super curious about my speculative guess work on her hidden left side. Sometimes when reverse engineering you begin to feel that you somewhat understand the artist's creative side, and can anticipate what their next move would or should be depending on the overall composition and the flow of the design.
Animation that shows how the 1x1x1 wall tiles are attached: Exploding animation