algorithmic modeling for Rhino


Pachyderm Acoustic

Pachyderm is a plugin largely used by Designers and Scientists alike to simulate acoustics in buildings, rooms, cities, and other settings.

Location: Earth
Members: 147
Latest Activity: on Wednesday

Hello Pachyderm Users,
We are going through an exciting period, including the startup of an organization to support the growth of Pachyderm, and extend the educational agenda of the project. In the next few weeks, we will be submitting our long-form 501(c)3 application, which will give us the rights of a not-for-profit organization established in the state of Connecticut. As part of the transition, we are phasing out the old website. The new site will be up in the next few weeks, and you can find it at:
We are looking forward to the next phase of this project, and we hope that you will be there with us to learn and continue to support us!
kind regards,
Arthur van der Harten
Executive Director
Open Research in Acoustical Science and Education

Discussion Forum

Delay in Simulation... 4 Replies

I repeatedly tried several times to run a test simulation for a small 3*3*3 meters room, as shown in the attached files below, in order to determine the SPL. However, running a simulation takes a…Continue

Started by Tarek Kamel. Last reply by Tarek Kamel on Wednesday.

IS method with more then 1 order 1 Reply

Hallo dear Arthur,I have a question regarding the Image Source component.I don´t understand why the creation of the Image Source with only 1 order, takes a couple of seconds (even for very complex…Continue

Started by G.C.Ruvio. Last reply by Tarek Kamel Oct 16.

Running Simulation... 1 Reply

I tried numerous times to conduct a simulation for a simple case study with one receiver and one source, but it took a long time each time, that can reach 20 hours and may not complete the…Continue

Started by Tarek Kamel. Last reply by Arthur van der Harten Oct 12.

crashing - Rhino7

HelloI set all the main Pachyderm parameters as by instruction (work in meter, all cores, use Nurbs, linear phase, and voxel grid with domain equal to 22). Yet, the simplest cube with 1 material, 1…Continue

Started by Vale Oct 1.

Comment Wall


You need to be a member of Pachyderm Acoustic to add comments!

Comment by Ishita Sahai on October 1, 2021 at 11:54pm
Hi, what all components of sound can be calculated in pachyderm? how can we calculate noise absorption?
Comment by Arthur van der Harten on August 15, 2021 at 9:42pm

Hi Harsh,

I think it depends on what you are doing. There are some systems that calculate the absorption coefficient of some commonly used systems in the absorption designer, such as a grid of perforations.

If you need something more bespoke than that, Pachyderm may not be the right tool at this time.


Comment by HarshS on June 24, 2021 at 5:37am

Is it possible to simulate and study resonance based phenomena such as Helmholtz resonator or Passive Destructive Interference in Pachyderm; and get the Absorption Coefficient across the frequency band?

Comment by Ander Perez on May 10, 2021 at 2:00am



I am trying to do some mapping calculations, but every time I start a calculatoin (Settings: Specific Ray Count, default settings), receiver displacement: Audience) Rhino crushes.


I've tried this in Rhino 6 and Rhino 7, but it keeps crushing. Is there something I am missing? Thanks for your help!

Comment by Arthur van der Harten on April 15, 2021 at 9:40pm

Hi Konsta,

I think I need more information. Would you mind emailing me a detailed explanation of the issue you are dealing with?



Comment by Konsta on February 10, 2021 at 1:01am
Hi everyone!
I have installed Pachyderm on Rhino 6 but it cannot calculate anything. Could be that there is no option to assign a material under materials tab. Any thoughts?
Comment by Behdad on December 15, 2020 at 10:15am
Hello Everyone, I have installed Pachyderm. But when I open the folder of the program in "Program Files", the Rhino Plug-in file does not exist. I have tried to rerun the installation and chose the repair option but it did not solve the problem. Has anyone had this problem before?
Comment by idspaceman on October 1, 2020 at 10:58am

Hi, unfortunately none of the two links to the website work. Both links are broken or lead me to a page with a password protection. 

Comment by Arthur van der Harten on September 4, 2020 at 11:56am

Hi Sebastian,

If your model is very complicated, this may be the reason. Occasionally, Rhino encounters a piece of geometry that can't generate a mesh, and then it fails pachyderm. I've tried to catch some of these cases, but some still elude us.

I can help you troubleshoot the model if you like. Can you send me the file to


Comment by Sebastian Novoa on August 31, 2020 at 10:38pm

Hello Arthur,

I'm trying to do a calculation inside a small chamber music hall (~490sqm). After applying a material to every surface and preparing everything (as told in this tutorial I click on Calculate Solution and the button grays out and the message "Solution exception:Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index" appears and I can't try again until restarting Rhino. I know this has happened before but I can't find a solution. I have a fairly complex geometry with reflective panels hanging from the ceiling, I don't know if it may be affecting. Thank you in advance.


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