Development & User Feedback

Here, we will post comments related to the development of the Xirus kernel and user feedback. Feel free to jump into the discussion by registering and leaving your comment.


  1. mgzambetti October 13, 2017 at 11:25 am

    This looks very intuitive and user friendly. I have not seen it in the demos, so I would like to ask if there is a plan to include some kind of face extrusion. Thanks.

    • Daniel Schmitter October 13, 2017 at 2:37 pm

      Yes, face extrusion will be available (either already in the first WIP on Nov. 20 or a couple of weeks later).


  2. define October 13, 2017 at 1:57 pm

    ‘mgzambetti’ has asked the exact same question, that I wanted to ask :), since I miss my tsplines-Plugin … may be I can vary it a bit. Will there be a proxy-geometry that we can tweak? Like subD- or cage-modelling? Will xirus allow for point- or edge weigth control? From what I saw in the videos, this is by far the best development in this business since Nurbs entered the stage. This could be a gamechanger.

    Most importantly! – PLEASE – don’t sell it away to AutoDESK (or the like). They will soon be at your frontdoor … or backdoor 😉 … be cautious. Best Regards Klaus

    • Daniel Schmitter October 13, 2017 at 3:06 pm

      Xirus is subdivision-compatible, where the subdivision cage interpolates the shape itself. I suggest, you try out the WIP and then give us more feedback based on your first experience with Xirus.

      –daniel (btw, thx for the nice feedback. We have been working extremely hard, several years, to develop this new geometry specifically for 3D CAD)

    • PodoTools November 22, 2017 at 9:48 am

      ” Will there be a proxy-geometry that we can tweak?”
      This is key to my T-Splines workflow, hope that Xirus will offer that. Combined with interpolation with the exact shape itself, I can’t wait.

  3. peter October 15, 2017 at 10:36 am

    i just want to know (maybe a stupid question )can i make sofa’s chairs with folds

    • Daniel Schmitter October 21, 2017 at 3:37 pm

      Yes, you can.


  4. simplehouse October 18, 2017 at 2:41 am

    Wonderful tool! By the way is there any funciton about match with decay? I like this function of VSR which is purchased by Autodesk.

    • Daniel Schmitter October 18, 2017 at 5:25 pm

      Thanks for the feedback. Regarding ‘match with decay’ I suggest you first try out the WIP (once available after 20. November) with all its augmented CAD functionality and then give us your feedback. Since Xirus offers a novel approach regarding 3D surfacing, we first try to understand the users’ real-world challenges before re-implementing functionality that exists in other products.


  5. tvellocet October 19, 2017 at 6:21 pm

    Is there a comprehensive list of tools and modifiers that Xirus currently has? Will it support lattice deformation? Boolean operations?

    • Pablo Garcia Amorena October 21, 2017 at 3:27 pm

      We will post a list of functions and commands with the release of the WIP on November 20. Xirus’ lossless conversion of objects to NURBS and polymeshes allows one to fully deploy the existing built-in Rhino functionality. Our plan is then to progressively add functionality to Xirus as the kernel evolves.

      —Pablo [Head R&D Mirrakoi]

      • tvellocet October 21, 2017 at 7:55 pm

        I see. I’m curious of how the conversion from polygon to augmented cad works. Lets say I convert a augmented cad model to polygons and then from that polygon back to augmented cad then most likely it won’t be the same model anymore right?

  6. PodoTools October 20, 2017 at 8:39 pm

    One of the reasons I use Tsplines is the retopo snap option that I use when modeling shoe lasts on foot scans (meshes). Does Xirus offer that? And can I use UDT tools like cage-edit on Xirus objects? And if I become dependent on Xirus, will you then please not sell it to Autodesk…?
    Erik Hondebrink

    • Daniel Schmitter October 21, 2017 at 3:47 pm

      You can convert Xirus’ geometry at any moment to the native Rhino geometry to make use of all the Rhino UDT tools. We will provide you with “augmented CAD” as long as you choose to be dependent on Xirus. Our mission is to offer our technology to the broadest possible user base in order to facilitate the designers’ workflow and enable them to design objects that are beyond the limitations of today’s existing CAD technology.


      • PodoTools November 22, 2017 at 9:39 am

        Thank you Daniel.
        Sounds great, unfortunately it seems that I have to wait for several weeks (?) before I can play with the WIP.
        Hope the WIP will be available soon.

        Erik Hondebrink

  7. tvellocet October 21, 2017 at 7:56 pm

    I work mostly on Mac like many designers. Is there word if and when there will be a MacOS Version of Xirus?

    • Daniel Schmitter October 22, 2017 at 12:32 pm

      Offering Xirus for Rhino-for-Mac is 100% on our roadmap. Its release depends on the availability and functionality of the Rhino-for-Mac SDK. We are in close contact with McNeel and will try to find a solution asap.


  8. myoshi October 31, 2017 at 9:49 pm

    In order for Xirus to work, will I have to convert Nurb surface into Xirus surface like how it is in Tspline?
    In other words, if I had a complicated geometry modeled in Rhino using Nurb surface, will I be able to use the functionality of Xirus on it without loosing the integrity of the geometry?

    • tvellocet November 1, 2017 at 2:15 pm

      I think its meant to be a subdivision modelling process like subd / T-Splne primarily. I think that most Nurbs patches will convert quite precisely but the resulting augmented cad control cage will not be the most convenient one compared to one constructed from scratch. A good starting point maybe…

    • Daniel Schmitter November 3, 2017 at 3:14 pm

      Right now we have implemented Xirus to NURBS conversion. The NURBS to Xirus conversion will come a few weeks later.


  9. Johnny November 5, 2017 at 3:09 pm

    Hi there!

    (My Scandinavian highschool English is not perfect, so hopefully I can make myself clear).
    I’m not so good in terminology regarding subd, polygons, nurbs, etc. and hardly even know what they means 😉 BUT I’ve working with Rhino T-Splines for years and I’m actually pretty happy with some of the work I’ve done (T-Splines has ‘ended’ quite some time ago but I’m still useing it).

    One of the challenges in freeform modeling (whatever the mathematical method is) are the curved edges. Especially those ‘almost creased’ ones. I mean edges where there are only a small but precise curved edge between two faces. Plus when you change the shape of the object, there is a danger that the shape changes in areas where you don’t want it to change. Curved edges doesn’t necessairly remain the same and straight surfaces (around the curved edges) doesn’t necessairly stay straight (of course, up to a certain point this is also ‘the nature’ of freeform modelling).

    I’d like to know if there is something new in Xirus when making/controlling a round edge between two faces?

    Thank You for your answer(s)!


    • tvellocet November 11, 2017 at 2:54 pm

      You mean Bevels and Fillets? From what I can see in the ‘tutorials’ (lol) is that those can be either done by manipulating the curvature weight handles or by refinement (subdivision basically) of a face strip and then by manipulating the sections. I’m also very curious about how it will play out. I hope its possible to automate this process for making quick and accurate radii similar to how the round corner / fillet tool works in most surface modelling applications

      • Johnny November 12, 2017 at 12:52 am

        Yes, among other things.
        If I remember right, there is some kind of ‘automation’ (tool) in Modo when working with the edges. Propably like the one you were describing (what they use in many modeling applications).
        It would indeed be a powerfull tool and a great help – especially when creating and handling PRECISE curves & edges (plus it helps to make certain things VERY fast).


  10. tvellocet November 8, 2017 at 12:55 pm

    Is it possible to divide Augmented CAD Shells into multiple objects and is it possible to combine multiple objects a single entity but separate shells?

    • Daniel Schmitter November 10, 2017 at 5:52 pm

      Yes it is. After joining several objects you can still keep selecting (and manipulating) each object individually as well as doing operations on the combined object as a whole.

  11. tvellocet November 11, 2017 at 3:08 pm

    Has the Mirrakoi Team been able to clarify the situation on the Rhino for Mac side of things with McNeel? I would really be able to get my hands on Xirus without having to use a PC or to instal Windows on my Mac. xD

    • Daniel Schmitter November 12, 2017 at 10:34 pm

      Thanks for your enthusiasm. You will hear from us as soon as we have news regarding Xirus for Rhino-Mac. More on the topic will follow early 2018…

  12. tvellocet November 20, 2017 at 3:09 pm

    Will Xirus Beta be released today?

  13. Johnny November 20, 2017 at 4:05 pm

    Really looking forward for this release 🙂 Hopefully it is not changing two hours before the end of the countdown.

    • tvellocet November 20, 2017 at 6:13 pm

      Well, thats exactly what happened 🙁

  14. tvellocet December 8, 2017 at 10:24 pm

    Since the release is delayed is it at least possible to get a screenshot of an object that isn’t a cylinder or a plane? Something with concise design and proper topology that shows off what Xirus can do?

  15. Johnny January 6, 2018 at 4:15 pm


    Just for interest: what does the schelude look like at THIS moment? (I fully understand if it changes later).

    Thank’s, and all the success for you guys!


    • Daniel Schmitter January 6, 2018 at 4:22 pm

      Hi Johnny,

      The WIP will be released the week of 15th January (or possibly already the week before).

      Thanks for your interest and support. We are looking forward to your feedback !


  16. Johnny January 7, 2018 at 2:35 pm

    So it is very soon!
    Good to hear and thank’s, Daniel, for letting us know!


  17. tvellocet January 16, 2018 at 9:27 pm

    It wasn’t released yet on the 16th. I hope it will still drop this week along with the Mac version or at least with some proper demo models along the way. It’s getting a bit long in the tooth without any design surfaces to show. I thought it was beta tested by people working in the design industry?

  18. Bermull January 21, 2018 at 1:31 pm

    A big thank you for this new subdivision approach and more.
    I worked several years with Tsplines and like a lot of designers I’m a little disappointed that there is no continuation with rhino.
    I am currently testing clayoo and Xirus.

    Thank’s again
    Best Regards

  19. tvellocet February 5, 2018 at 11:48 pm

    Waiting for the Mac version. How is the general feedback concerning the release? Has anyone managed to build some proper design surface yet?

    • Daniel Schmitter February 6, 2018 at 9:04 pm

      As soon as we get the Rhino SDK for Mac (not sure when that will be), we will work on Xirus for Rhino Mac.

      Regarding “Has anyone managed to build some proper design surface yet?”:
      As we are closely working with companies in different industries we do have industrial models built with Xirus (digital and manufactured), POCs, and alike. As soon as we have models that we are allowed to share, we will do so (coming soon).

      First, in the next days, we will release an updated with improved UX and some additional features.


  20. Daniel Schmitter February 9, 2018 at 7:53 pm

    We have released an update with substantial improvements:


  21. Bermull February 12, 2018 at 3:02 pm

    The tools you offer are great.
    I wondered if a few grasshopper components were in the pipeline to use them parametrically.
    Thank you in advance.

    • Daniel Schmitter February 12, 2018 at 10:34 pm

      We have plans for a Xirus GH integration but it will take a while. Right now, we are still focused on adding new kernel functionality and UI components to improve UX and the range of applications. Thx for your feedback !


      • Daniel Schmitter February 12, 2018 at 10:37 pm

        (However, in the meantime through the bi-directional Xirus-NURBS compatibility you might be somehow able to indirectly use both Xirus and GH for your projects.)

  22. Bermull February 14, 2018 at 12:54 pm

    Thank’s Daniel,
    I look forward to following your developments …

  23. Johnny February 16, 2018 at 6:10 pm

    I opened Rhino and saw that Xirus was gone. I downloaded Xirus again but can’t find it anywhere when opening Rhino.
    – What might be the problem?

    • Daniel Schmitter February 16, 2018 at 9:44 pm

      Hi Johnny,

      Is it possible that you installed Xirus for all users on your computer (instead of “Install Xirus WIP for: Just Me”)?

      Can you try to uninstall the plugin (follow these instructions: and then reinstall again and tell us if it works?

      Did the problem appear with the first Xirus WIP (without toolbar yet) or with the update (WIP with toolbar)?
      Did the problem appear after you installed the Xirus update or did it just randomly appeared one time when you opened Rhino as usual?

      Thanks for answering.


  24. Johnny February 18, 2018 at 11:56 am


    Difficult to say ‘did it appear exactly after the installation.’ I have Windows installed in my Mac but it’s a real Windows, which means I have to open the computer as a Mac or as a Windows. So I don’t use Windows all the time. But I don’t think this is the case because both Rhino and T-Splines has been working fine in my Windows.

    BUT there is (regularly) an issue with Rhino toolbars and T-Splines toolbars: they disappear maybe once a week. As a resolution I have to delete the ‘TSplines.rui’ and go to Rhino toolbars and ‘Restore Defaults’ and start the program again. This has become a ‘once a week’ habit 😉 I’ve seen in Rhino Forum that this is the case for quite many with Rhino.

    – Could it be something similar with Xirus?

    Ps. I tried those things you said but nothing helped (uninstalled and downloaded Xirus as ‘only for me’ but don’t see Xirus when opening the Rhino).


    • Daniel Schmitter February 19, 2018 at 12:56 pm

      Could you send an email to so we can continue the thread through mail?

      it’s the first time we experience this problem, but we will try to solve it asap.



  25. Johnny February 18, 2018 at 12:46 pm

    …it happened AFTER the update / downloading of the new Xirus toolbars. Atleast one time I used / tried those new toolbars, but don’t remember if used them (=opened Rhino) several times before that.


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