BMesh is the new mesh modeling architecture that is currently in development and scheduled to be included with Blender 2.63 or 2.64. This new BMesh system is very powerful and brings Blender’s modeling tools into the modern era.
You can download development testing versions of Blender from Graphicall.org
One of the main capabilities of BMesh is full NGon support so that you may have polygons with more than four vertices. This helps to make the modeling process far less destructive and easy to work with. Along with NGons, BMesh also opens the doors for many new mesh modeling features and tools that previously had not been feasible.
This video overview gives you a demo of several new features that are already included with the development versions, including the new Super Knife tool, and it also helps clarify what BMesh means and how it effects you the artist.
Overall, BMesh adds substantial new power to the Blender’s modeling toolset and can drastically speed up your modeling workflow. Personally, I love it and already feel crippled when I go back to the current modeling system.
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