Thanks for sharing that! Glad to see someone else with experience sharing 3D scatter plots. I’d heard of Voila but hadn’t looked into it. This actually could serve as the answer to a different question I asked on the FastAI forums.
SOLUTION: Just on a lark, I thought I’d try re-installing RISE (even though it’s in my requirements.txt) after the jupyter trust, and it works!
$ cat .binder/postBuild
#!/usr/bin/env bash
jupyter trust */*.ipynb
pip3 install rise
The same Binder link now auto-starts the slideshow, and all the Plotly plots are already showing! 