For those transitioning from Maya and Alias SubD modelling - what is the “Rhino way” to deal with 1. the extra height at the T-junction, and 2. the soft-kink in the arched part?
quite similar to this older topic - but i do not like the solution there.
circles / cylinders are best / minimal approximated by 8 around faces.
based on this rule of thumb, you can have a face (left) or an edge (right) at the top - resulting in 2 different typologies:
subd_yblend_tp.3dm (1.8 MB)
if you want a certain subd point at an exact height, you will need 3x3 vertices at the same height see the dice below: 2x2 faces / 3x3 vertices - but resulting in 0 curvature…
so the y-blend has a certain limitation when it comes to “make it the same height”.
if you need an engineering precision, you have to do it with nurbs modelling - and maybe use the new patch tool of Rhino V9 / wip.
kind regads - tom
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All right, I see, but the Multipipe command doesn’t let me change the number of faces to that of a standard NURBS circle (8), and it always creates kinks when using arcs, see also below (arc + degree 3 curve, aligned G1, not joined). Not as useful as I hoped for.
can you upload the file please ?
File Multipipe.3dm (292.7 KB)
All right, and then SubDivide to obtain 8 faces for better subsequent modelling operations.