never really needed to weld vertices of splines until now
(using spline cage modelling)
i'm having trouble.. seems like some pairs of vertices in a spline can be
welded whereas some pairs cannot... no matter how high i turn
up the weld threshold, or use a 3d snap to make sure the
2 vertices join, or using 'fuse' then weld, some pairs of
vertices just don't weld.
is there any rules to welding?
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