How to use Meshmixer's Select
and Extrude
tool to solidify a surface mesh created with phstl
:
-
 Open Meshmixer and import surface.stl
-
Select the
Select
tool and make an interactive selection on the surface. Then chooseSelect All
from theModify
selection submenu.
-
 Set the offset to a value like
15
mm and set the extrusionDirection
toY Axis
to ensure uniform extrusion. -
Click
Accept
and export the extruded solid.

Follow the same steps as above, but set the extrusion EndType
to Flat
. You may want to specify a negative Offset
(eg, -15
) to position the flat base correctly.