Blender 3D HOW-TO smooth curves on imported SVG graphic
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https://youtu.be/U4zNEbN8lIQ?t=398
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Blender 3D HOW-TO smooth curves on imported SVG graphic
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CURVES - COMPARED TO POLYGONAL MESH
https://wiki.blender.org/index.php/User:Jaredr122/Doc:2.6/Manual/Modeling/Curves
One main advantage to curves over polygonal meshes is that curves are defined by less data, so can produce excellent results using less memory and storage space at modeling time.
However, this procedural approach to surfaces can increase demands at render time.
Some modeling techniques like extruding a profile along a path are only possible using curves. At the same time, vertex-level control is more difficult when using curves.
There are times when curves and surfaces are more advantageous than meshes, and times when meshes are more useful. It is recommended you read the section on mesh editing, which should help you decide whether to use meshes or curves in your project.
When you have finished reading and learning about Bézier and NURBS curves there are several more advanced examples on the application of curves in the tutorials section for modeling complex objects.