Tutorial is partially outdated. A lot of new tools came out since this tutorial was recorded. Here is outdated parts:
– Scale “undercut” object. → Now there is offset tool (Shrink/Fatten with Even Thickness option enabled).
– Creating additional “measurement” objects to check thickness or length. → Now there is Ruler/Protractor tool.
– Using netfabb for model checks. → Now Blender has 3D Print Toolbox add-on and Mesh Analysis tools.
– For boolean operations it is better to use Booltron add-on: https://youtu.be/KxbJSUQpw7I Instead of Sculpt Tools UI add-on.
Why NURBS circle is not perfect: https://www.blender.org/forum/viewtopic.php?p=3426&sid=811ac0150dae2688cd55939d8410423f
In this tutorial we will build jewelry ring ready for 3D printing from scratch, using non destructive modeling workflow which allow us to change product and quick easy.