in 9.5 134 64bit it worked better than it does now. Old scenes load up with a lot more garbage triangles on the items in the latest version. It's actually quite hard using a default cube and shatter to get clean cuts without garbage tris.

Steps:
create shelf box
set it to polygon mesh
add a shatter

note the garbage polys
change the seed amount to try and get rid of the garbage triangles…
from 0-10 only 8 and 10 are clean, the rest all have problems. I don't think it used to be this bad.

I'm on build 156 and I can't get a single shattered cube to not have those tri's sticking out. I've tried modifying all the parms too.

Looks like this is old news.
And the final comment is a bummer.

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=12474&highlight=shatter [sidefx.com]