Perhaps I’m not cut out for this whole modeling thing! I can get this modeled in poly software, but I need polysurfaces in Rhino and it’s really kicking my butt. This is a hammer for an antique pistol and I can’t seem to figure out how to blend the two. The extrusion is flat and I think a simple fi…

What exactly do you mean with “blend”? Fillets? Transition surfaces? A square-to-circular transition ? Do you have sketches or mock-up photos of what you want this to look like?

I’m not exactly sure if I’m using the right terminology. Here is a photo of the part, but I’ve put some colored lines over it to demonstrate what I’m trying to explain. The red part is mostly a flat extrusion, in which I want to bevel the edges a bit. So when the thumb goes over the top part of the …

That whole thing looks rater soft though, the top spike seems like a “wavy cone”, judging from the crude photo’s highlights, unlike a blocky 2D extrusion. If all you have is that low-res 2D scan from a book, probably SubD should do the job nicely.

Yeah, I was thinking that was probably what I should do. But, I’ve never used any of the subd tools in Rhino yet. Also, do they interface well with Polysurfaces? For example, I will need to make a slightly larger outer wall to do a difference with the part this attaches to, so I can have a bit of to…

splitting the pipe shape into 4 surfaces then blendsrf to the square element.. you’d need to create some space between the pieces in order to have room for the blend to happen, but as Lagom said, I think that will not yield the shape you are looking for…

Now is a suitable opportunity to use them. With the ToNurbs command, you can then convert your SubD surfaces to NURBS surfaces for further refinement.

[image] Jordan_Miller: But, I’ve never used any of the subd tools in Rhino yet Hi @Jordan_Miller Here’s @theoutside ’s “paper doll” video , which is a great introduction to this type of modeling. Sub-D’s aren’t hard (but takes a little getting used to), especially if it doesn’t need to be exac…

i would suggest a different typology for the initial subd befor paperdolling it: (see second row) [image] have a central star-point and 2 face loops for each “arm” [image] do a more “sphere like” cap at the tip [image] use _reflect to add symmetry ( @theoutside : the non-constant ( no constant…

[image] Tom_P: the non-constant ( no constant fixed pixel width) red shiny symmetry-indicator is so annoying …) I assume that is the same as RH-87298 Symmetry line thickens with z height

[image] Gijs de Zwart: assume that is the same No - answered in the original topic

I need help with another tricky blend!

Rhino

jim October 9, 2025, 12:18pm 12

The picture you posted doesn’t show the whole shape. Another view would be nice.
Here is how I would model this percussion hammer.
hammer.3dm (549.4 KB)

Rhino 8 reset after opening a file from the forum

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I need help with another tricky blend!

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