I’ve known that the reason why sometimes a flange or extra geometry occurred at the edge of the clipping stroke is the Clip Brush does not remove the clipped part it just presses it towards the stroke. However when sometimes I hold on opt key, it comes out the result below:
Why it happens? I’ll appreciate any reply.
P.S. My system info: Mac OS X 10.7.4, using Z4R4 OSX.
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