The method of triangle mesh translated to quadrangle mesh is that delete common side of two adjacent triangle mesh.

三角形网格转化为四边形网格的方法是将两个相邻的三角形网格的公共边删除，使之转化为一个四边形单元。

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Delete the faces that are created inside the mesh at the area of symmetry for the character (this is created during the extrusion process).

在我们进行镜像之前，删除模型内侧的面，(这是在挤出过程中创建出来的。)

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Delete the faces that are created inside the mesh at the area of symmetry for the character (this is created during the extrusion process).

在我们进行镜像之前，删除模型内侧的面，(这是在挤出过程中创建出来的。)

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