Rhino urgently needs these tools!

[Rhino_Bulgaria (Bobi)]

My next proposal is related to the “Match surface” tool, whose “Refine” option is notorious for adding of unwanted spans as a way to match the surfaces as close as possible withing the set tolerance.

A better approach would be to raise the degree of the surface and keep the spans intact. That way, the surface will be far smoother than the current approach whose added multi-spans destroy the smooth flow of the matched surfaces.

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Here is one example where the raised degree shows its advantage over the regular “Refine” option of “Match surface”.

BUG: BlendSrf weird surface construction

There is something super wrong with the split surfaces that were used as target edges. In general, I would avoid using multi-span fillets and blends in such scenarios. It may be better to rebuild them to single-span, non-split surfaces via the “RefitTrim” tool, followed by matching their edges to the adjacent surfaces. [Weird bug in Rhino, plus fix (not my model)] In the above video I tried to use one of the workarounds (extending the edge as a separate surface, then repeat that a…

20250826_BlendSrf_BUG.3dm (601.6 KB)

Weird bug in Rhino, plus fix (not my model)

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In fact, this is in line with another proposal in this topic, which is to enable rebuilding of the surface to be matched within the “Match surface” tool (and several other tools, as well). This is exactly the biggest power of programs like Alias over Rhino. Alias has “Explicit control” option for its NURBS surfacing tools that allow the user set custom parameters for the surface topology during the preview of the active command. Quote from post #1:

@Rhino_Bulgaria

There is no “Explicit control” option (something like an internal surface rebuild) in the primary surfacing tools, including “Match surface” and “Blend surface”. This is a huuuuge miss for Rhino. HUGE. The developers much focus on this one first