What kind of concrete finish was used in this Tulum treehouse?
Floors probably have some kind of overlay maybe a  on top of concrete.  You can tell by the control lines in the floor that it was poured.  The control lines also show a different color.
It might be something like the &quot;seamless natural floor plaster&quot; picture here:
https://www.stuccoitaliano.com/floor-plasters
Walls are probably the same overlay on concrete block.