When you're making symmetrical models, you can use the Mirror command to copy and flip the subdiv surface. This takes a few more steps than with polygons because you can't mirror a subdiv surface directly. To mirror a subdiv surface:
When your model is made up of many separate pieces, you can use the Attach command to join them as one piece. However, any edges you attach must have the same number of vertices. To attach two subdiv surfaces:
Tip
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