Large size WSF printing, smooth enough for large print?

Discussion in 'Technologies and Hardware' started by polyoptics, Oct 29, 2010.

  1. polyoptics
    polyoptics New Member
    Last edited: Oct 29, 2010
  2. Kaetemi
    Kaetemi New Member
    Your item is set private, I cannot view it.

    I'd say, if you remove smoothing groups on your item, and view it on your monitor at the printed size, and you don't see any triangles, you won't see any on the print either.

    What I do is excessively smooth the object until it just doesn't hang my machine, and then optimize it back down to an acceptable level. That way the triangles will be more efficiently located where they are really needed.

    [​IMG]
     
    Last edited: Oct 30, 2010
  3. polyoptics
    polyoptics New Member
    Thanks for the examples!

    I think I have a handle on it however, with a hollow 6 inch figure with many curved parts to the surface AND being hollow, I am having a hard time get the tessellation very smooth and keeping under the shapeways 65mb file size limit...

    I'll keep trying, thanks again for the info man!
     
    Last edited: Nov 3, 2010
  4. GHP
    GHP New Member
    I think what Kaetemi is saying is that you should use a high polygon count to get a smooth surface to start with, then reduce the number of polygons (e.g. by quadratic decimation) as far as you can without affecting the smoothness too obviously. This is likely to produce a better effect than creating the object with the smaller number of polygons to start with.

    I use quadratic decimation in Meshlab, and it seems to work best if you do it in stages (e.g. by reducing the number of triangles by half, which is the default), rather than trying to reduce to the desired number of triangles in one step. This can sometimes result in the object becoming non-manifold, but it should be fixable in NetFabb, and sometimes even fixes itself with further decimation.