I MAKE Workshop is a collaborative workshop series tailor-made for The Hong Kong Polytechnic University's School of Design (SD) 'Creative use of 3D Printing technologies' event. Participants (local secondary school students) will learn the basic Blender Modeling for 3D printing.
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Workshop 5:
1. Use background image​
2. Use single vertex to create profile edge
3. Remove duplicated vertices
4. Use Spin to create 3D geometry form
5. Use Boolean modifier
6. Use Smooth shading
7. Use EdgeSplit modifier

Load Background Image
Download the reference image from http://www.freestencilgallery.com/ Under 3D View's "Property Panel", select this image under "Background Images" section
Use the default geometry to create a profile curve
Rename the Cube to "Bishop" in the Outliner, then delete ALL vertices from the default cube.
Hold "Ctrl" key and LMB-Click to create extra vertices to complete the profile curve.
Spin to revolve the curve creating a geometry
*Switch to Top Orthographic View
Highlight all the vertices, apply "Spin" feature and input "360 degree" to close the geometry
Remove the duplicated vertices
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Create a new Cube and Use Boolean Modifier to subtract from Bishop geometry
*select the Bishop geometry before adding Boolean modifier, then
Delete the Cube geometry after operation
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Apply Edge Split modifier to keep trimmed edges sharp
Choose Smooth Shading mode to render out a smoother surface

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In-class exercise & Studio:
Download images for other chess pieces and practice above features to create complex geometries. Use features you learned from previous workshops
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Prepared by Ann/y Leung (Open Education Evangelist and Founder of OSMM.HK)
Useful websites to learn Blender:
​Official tutorials - http://www.blender.org/support/tutorials/
Official Manual - http://www.blender.org/manual
BornCG Channel - https://www.youtube.com/user/cgboorman
Blender Cookie - https://cgcookie.com/blender/