These Models were part of the Lost in the Swamp Kickstarter
www.kickstarter.com/projects/stratationdesign3d/lost-in-the-swamp-3d-printable-game-terrain-and-creatures
You will have 5 files of different looking rocks.
They have been optimised for FMD printing (PLA) or SLA resin printing.
These files are for non-commercial personnal use only.
For further information and to support my work, visit my Patreon page:
www.patreon.com/stratationdesign3d
To see my projects and support my work too:
www.kickstarter.com/projects/stratationdesign3d