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For those of us who are not familiar with the domain, what differentiates this from Blender? Does Blender not support NURBS? If not, why is that the case?

hirako2000 5y ago
Blender supports NURBS. What differentiates this from Blender? Blender is a full fledged pipeline of tools, not to CAD, extensive modeling tools, texturing, rigged animation, post production, multiple rendering engines. It's like comparing a specific photo editor that say focuses on filters and color adjustments, with Photoshop.
- eurasiantiger 5y ago
  In other words, Blender is the Emacs of the 3D world.
  - hirako2000 5y ago
    it probably deserves the comparison with Linux altogether as it's even more multi purpose and has become, at lead since v2.8, not only appealing to total geeks. I can't think of any other open source software, other than Linux, that represents such a threat and valid alternative to commercial products. Autodesk be damned, even merging with Adobe wouldn't solve the Blender problem.
  - skykooler 5y ago
    Right. It's even got things like a text editor with syntax highlighting and an image editor. If someone spliced a browser in there, it could practically be a whole OS on its own.
danboarder 5y ago
Blender has supported NURBS (Non-uniform rational B-spline) modeling since 2.9 (fairly recent). https://www.makeuseof.com/nurbs-curves-3d-modeling-blender-tutorial/ https://www.makeuseof.com/nurbs-curves-3d-modeling-blender-t...
- riidom 5y ago
  That's not true, see https://blenderartists.org/t/nurbs-surface-creation-2-49/489982 https://blenderartists.org/t/nurbs-surface-creation-2-49/489... (2010) (it may be even older than that, but I don't know about the pre-2.49 era)
fsloth 5y ago
On a higher level: A 3D editor mainly intended for visual pipeline such as Blender, and a modeling application intended for producing physical shapes have entirely different constraints and intents. They both operate on 3D data, but it's best to leave it at that. If we use text files as an analogue, then the "3D" feature in these applications is roughly a similar unifying feature as "text based input" in programming languages - or in all programs for that matter. For text files, you want it to have specific encoding - e.g. UTF-8. For 3D shapes, you want the data to similarly follow a mathematical schema with specific topological constraints. If you break the convention of the encoding, or the schema, you produce gibberish. With a specific standard in place some parts of input data may or may not be transferrable between domains (e.g. CSV data is kind of lingua franca) and lots of interesting things can be built on top of that. But generally you could ask "how is this different from" X where X can be for example Excel or Photoshop - the answer is very complex.
blenderdt 5y ago
Blender does support NURBS but very basic and very limited to the point that it's not very useful. Basically there are 3 methods for creating 3D content: * Voxels (points in space) * Polygon (vertices, edges and faces) * Mathematically calculated (NURBS, CAD) Blender uses all three but focusses on polygon modeling (triangles). The real pro of NURBS mondeling is that you are working with surfaces that can easily be shaped. That's why this method is used a lot in product development. Since all surfaces are calculated they also are infinite smooth. When you want a smooth surface with polygon modeling you need a lot of triangles. For each category there are different tools, Blender is just one of them. Some examples of software products per category: product design: Rhino car design: Alias house design: Revit technical components: Fusion 360 game assets: Blender sculpting: Z-Brush movie GFX: Houdiny
- colordrops 5y ago
  Very informative, thank you
- dagw 5y ago
  Rhino (with Grasshopper) is massively popular among architects as well.
  - simulate-me 5y ago
    Grasshopper is used a lot for parametric 3D printing as well (the printer prints a one continuous space-filling curve rather than individual layer slices).
ur-whale 5y ago
> what differentiates this from Blender? NURBS support in Blender is very minimal and nowhere near what real NURBS modeling packages can do. For example, Blender can't even import STEP or IGES natively while even FreeCAD can.
dsign 5y ago
As others have said, Blender supports NURBS, but it is not too fancy. I have played before with Moi3D[^1], which is "3D modeling for designers and artists", and I also use Blender and ZBrush quite a bit. My impression so far is that CAD-like specialized software is not worth using for artistic 3D modelling, at least the type which is only intended to be shown on a screen. That's because Blender's NURBS, curves and surfaces are good enough for simple shapes. For relatively complex shapes, the solvers in CAD engines can be very slow and glitchy[^2]. With a little bit of patience, one can do amazing non-destructive hard surfaces using curves and Blender's Geometry nodes (specially now that there is support for curves). With an entirely different workflow, ZBrush is a mighty hard-surface modeller as well[^3]. That's not to say that there aren't scenarios where one may have use for a solver, but they are so specialized that most artists would be better off doing the math outside their 3D modeller (or renting Fusion360 for a month, but for a casual user that software has to be more intimidating than using Python and Kiwisolver). [^1]: http://moi3d.com http://moi3d.com [^2]: http://moi3d.com/forum/index.php?webtag=MOI&msg=10620.1 http://moi3d.com/forum/index.php?webtag=MOI&msg=10620.1 [^3]: http://docs.pixologic.com/user-guide/3d-modeling/hard-surface/ http://docs.pixologic.com/user-guide/3d-modeling/hard-surfac...

hirako2000 5y ago

Blender supports NURBS. What differentiates this from Blender? Blender is a full fledged pipeline of tools, not to CAD, extensive modeling tools, texturing, rigged animation, post production, multiple rendering engines. It's like comparing a specific photo editor that say focuses on filters and color adjustments, with Photoshop.

eurasiantiger 5y ago
In other words, Blender is the Emacs of the 3D world.
- hirako2000 5y ago
  it probably deserves the comparison with Linux altogether as it's even more multi purpose and has become, at lead since v2.8, not only appealing to total geeks. I can't think of any other open source software, other than Linux, that represents such a threat and valid alternative to commercial products. Autodesk be damned, even merging with Adobe wouldn't solve the Blender problem.
- skykooler 5y ago
  Right. It's even got things like a text editor with syntax highlighting and an image editor. If someone spliced a browser in there, it could practically be a whole OS on its own.

danboarder 5y ago

Blender has supported NURBS (Non-uniform rational B-spline) modeling since 2.9 (fairly recent). https://www.makeuseof.com/nurbs-curves-3d-modeling-blender-tutorial/ https://www.makeuseof.com/nurbs-curves-3d-modeling-blender-t...

riidom 5y ago
That's not true, see https://blenderartists.org/t/nurbs-surface-creation-2-49/489982 https://blenderartists.org/t/nurbs-surface-creation-2-49/489... (2010) (it may be even older than that, but I don't know about the pre-2.49 era)

fsloth 5y ago

On a higher level: A 3D editor mainly intended for visual pipeline such as Blender, and a modeling application intended for producing physical shapes have entirely different constraints and intents. They both operate on 3D data, but it's best to leave it at that. If we use text files as an analogue, then the "3D" feature in these applications is roughly a similar unifying feature as "text based input" in programming languages - or in all programs for that matter. For text files, you want it to have specific encoding - e.g. UTF-8. For 3D shapes, you want the data to similarly follow a mathematical schema with specific topological constraints. If you break the convention of the encoding, or the schema, you produce gibberish. With a specific standard in place some parts of input data may or may not be transferrable between domains (e.g. CSV data is kind of lingua franca) and lots of interesting things can be built on top of that. But generally you could ask "how is this different from" X where X can be for example Excel or Photoshop - the answer is very complex.

blenderdt 5y ago

Blender does support NURBS but very basic and very limited to the point that it's not very useful. Basically there are 3 methods for creating 3D content: * Voxels (points in space) * Polygon (vertices, edges and faces) * Mathematically calculated (NURBS, CAD) Blender uses all three but focusses on polygon modeling (triangles). The real pro of NURBS mondeling is that you are working with surfaces that can easily be shaped. That's why this method is used a lot in product development. Since all surfaces are calculated they also are infinite smooth. When you want a smooth surface with polygon modeling you need a lot of triangles. For each category there are different tools, Blender is just one of them. Some examples of software products per category: product design: Rhino car design: Alias house design: Revit technical components: Fusion 360 game assets: Blender sculpting: Z-Brush movie GFX: Houdiny

colordrops 5y ago
Very informative, thank you
dagw 5y ago
Rhino (with Grasshopper) is massively popular among architects as well.
- simulate-me 5y ago
  Grasshopper is used a lot for parametric 3D printing as well (the printer prints a one continuous space-filling curve rather than individual layer slices).

ur-whale 5y ago

> what differentiates this from Blender? NURBS support in Blender is very minimal and nowhere near what real NURBS modeling packages can do. For example, Blender can't even import STEP or IGES natively while even FreeCAD can.

dsign 5y ago

As others have said, Blender supports NURBS, but it is not too fancy. I have played before with Moi3D[^1], which is "3D modeling for designers and artists", and I also use Blender and ZBrush quite a bit. My impression so far is that CAD-like specialized software is not worth using for artistic 3D modelling, at least the type which is only intended to be shown on a screen. That's because Blender's NURBS, curves and surfaces are good enough for simple shapes. For relatively complex shapes, the solvers in CAD engines can be very slow and glitchy[^2]. With a little bit of patience, one can do amazing non-destructive hard surfaces using curves and Blender's Geometry nodes (specially now that there is support for curves). With an entirely different workflow, ZBrush is a mighty hard-surface modeller as well[^3]. That's not to say that there aren't scenarios where one may have use for a solver, but they are so specialized that most artists would be better off doing the math outside their 3D modeller (or renting Fusion360 for a month, but for a casual user that software has to be more intimidating than using Python and Kiwisolver). [^1]: http://moi3d.com http://moi3d.com [^2]: http://moi3d.com/forum/index.php?webtag=MOI&msg=10620.1 http://moi3d.com/forum/index.php?webtag=MOI&msg=10620.1 [^3]: http://docs.pixologic.com/user-guide/3d-modeling/hard-surface/ http://docs.pixologic.com/user-guide/3d-modeling/hard-surfac...