I don't know how to set the elevation for materia-ui paper in reagent-material-ui (https://github.com/arttuka/reagent-material-ui)
Paper elevation in Material UI: https://mui.com/material-ui/react-paper/#elevation
I tried the trivial:
[paper {:variant :outlined :elevation 12} "test 123"]
No elevation is rendered: no-elevation
The problem was clearly stated in an error I haven't noticed until now.
Outlined variant does not work with elevation. Removed the outlined variant and the elevation was rendered.