| Greetings and Salutations [message #53469] Sat, 01 September 2012 10:57 UTC |
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Well hello everyone.
My name is Neil and I've been a 3D modeler for a couple of years now. A few years back... oh dear, I'm getting old, I did a silver smithing course out of interest, but didn't really do anything much since. A workmate mentioned that shapeways printed 3d models in silver, so I thought I would give jewlery another go. I've uploaded a test model (a simple ring) and ordered a few different materials, as well as the sample kit, so I will probably not seem too active until I get them.
In the mean time I think I'm going to have to pick up a new modeling package (I don't want to pay for a commercial 3Ds Max licence strait off the bat), so I'm going to fiddle arround with blender and 3D Coat, and see if I can replicate the rings I made during all those years ago. Once I've done that, I may branch out into some other things...
In any case, I look forward to participating in the community.
One initial question I do have is 'how do printed models deal with smooth faces'. Being that nothing is truly curved in poligonal models, how well does the printing process hold up the difference between smooth faces and hard edges? I have a feeling that the ring I have had done as a test print will have hard edges, as it did in the 3D preview on the site, and I currently don't know enough about blender or wings 3D (which I switched too as soon as I realised that blender didn't have a working edge bevel tool) to be sure to export smooth edges to test it myself. What are peoples experiences there?
Thanks,
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| Re: Greetings and Salutations [message #53494 is a reply to message #53469 ] Sun, 02 September 2012 06:47 UTC |
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Hi Neil,
Welcome to Shapeways! 
For getting as smooth as possible* surfaces on your prints, I recommend making the triangles of your model as small as possible whilst staying within the 1 million triangle and 64MB** upload limit. Generally triangles with their longest side around half the size of the minimum detail for the material of choice works well.
I haven't a clue how it works in Blender, but there should be an option to turn off (visual) smoothing, as well as there being a subdivision smoothing tool.
* Due to the additive nature of 3D printing you'll notice some stepping with most unpolished materials.
** A binary STL file will come in at under 50MB with 1 million triangles, other filetypes vary, but Shapeways do accept larger than 64MB files contained within a zip folder, as long as the zip is under 64MB
Paul
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| Re: Greetings and Salutations [message #53520 is a reply to message #53494 ] Sun, 02 September 2012 23:27 UTC |
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Blender has Set Smooth & Set Solid to change the face smoothing. If done out of Edit mode, it will affect all the faces. Add a handful of monkey heads and play with the buttons and different selections, to understand what is affected and when.
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| Re: Greetings and Salutations [message #54694 is a reply to message #53469 ] Mon, 01 October 2012 05:59 UTC |
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The result of the test model, that I mentioned in my previous post.
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