Hi Jesse,
In my tests today the "surface smooth" command works fine on an STL file.   e.g. test.stl attached, example commands:

open test.stl
surface smooth #1 factor .5 iterations 5
hide #1 models

See help for explanation of the parameters:
<https://rbvi.ucsf.edu/chimerax/docs/user/commands/surface.html#smooth>

The surface smooth command makes a new model #2 (unless you add "inplace true" to overwrite the original #1), so the old one is still shown unless you hide it, as in the example commands above.

I do not have an obj file handy to test, but this command should work on any surface model.

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco




> On Jun 2, 2023, at 7:18 AM, Jesse Hansen via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>
> dear all,
>
> I have an object imported from segmentation in dragonfly that is quite jagged and rough looking.   Is there a way to smooth the surface?   When I try "surface smooth" that doesn't work because I guess it's looking for atoms/surface render.  Is there a way to smooth .stl or .obj files?    Thanks
>
> Jesse

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