Repetier always saves the  gcode in the working directory as composition.gcode.  So if you don't save it right away, it will still be there so long as you don't slice something else.  If the file is really large, it could run out of memory before it gets all the way though.  I usually end up with something like 3 million polygons coming out of photo2mesh, and try to decimate it down to 500k or 250k.  It will still take longer than usual to slice, but not hours.  I tend to have more confidence in KISSlicer when doing those, and KS is faster than Slic3r.

Cool. Thanks.

once the slicer is done and put the gcode out you can do whatever you want with the gcode.

Only in latter versions of Slic3r if you configure the Resolution setting in Advanced.

No matter the size, should the slicer eventually complete slicing a file? Maybe 100 minutes per 100MB or whatever? Even if longer it would not continue working if it was hopelessly too large? And afterwards can the G-Code be saved in case I slice one day, and print the next?

Sometimes the detail doesn't show up in Repetier because of the way it does light and shadow.  Try playing around with the lighting settings in the 3D visualization settings.  Also look at it an an extreme angle and see if you can start to see some of the shape.   Any photo2mesh model will need some decimation to reduce the polygons, which you can do in Meshlab.  Also run it through Netfabb before trying to slice it.  Even after taking those steps it will probably take longer than usual to slice because there are so many line segments to calculate

I already tried netfab online without success. But I will try messing with the lights a bit. Thanks.

RavensCrest wrote:

for slic3r, did you set how many process thread you will be using to slice your object?!
I have quad core, so I increased it to 3, so i can still browse while it is slicing.

I'm not sure what that is.

If you are using Repetier Host, it's under Slic3r->configure->print Settings tab->advance , and "threads"
to check how many cores you have.. just open Task Manager, it should tell you how many core you have from the cpu usage graph.

I tried making some with my router a couple times but had too much slop in the Z axis so they weren't quite up to par

Check out this thread it should help you out

http://www.soliforum.com/topic/800/phot … portraits/

Thanks for the link. I think I've seen it before, which might have been how I learned of the software to start with. lol. Apparently lithoplanes are some sort of wood and film technique that people once used?

for slic3r, did you set how many process thread you will be using to slice your object?!
I have quad core, so I increased it to 3, so i can still browse while it is slicing.

I'm not sure what that is.

Does the software look like this free thing --> http://www.thingiverse.com/thing:74322 that is for making lithopanes from photos?

Yes, that is exactly the type of thing it does.

http://www.soliforum.com/topic/800/phot … portraits/