algorithmic modeling for Rhino

Pachyderm Acoustic


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: 29
Latest Activity: Sep 12

Discussion Forum

Installation issues 15 Replies

This is a place to ask qustions about installation. Please post your questions here and I will get to them as quickly as I can.Continue

Started by Arthur. Last reply by Asli Sep 12.

Probem with installation

Hi everyone,I have tried to install Pachyderm on my computer but I'm facing an issue; when I start the installation it tells me that Rhinoceros5 SR12 is required but I only have Rhinoceros5 SR 5 and…Continue

Tags: problem, installation

Started by Davide Girardi Aug 9.

Geometrical Acoustics 4 Replies

This forum is for you to bring up any questions about how to use the Geometrical tools. Feel free to ask any question you like. I will reply as quickly as I can.Continue

Started by Arthur. Last reply by Arthur Aug 5.

Software capabilities 1 Reply

Hi!This is very interesting, but I have some questions about the applicability / limitations of your software. What it can and what it can not do. I am an architect, used to formfinding but am not…Continue

Started by Ludvig Haav. Last reply by Arthur May 24.

Comment Wall


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Comment by Arthur on July 23, 2017 at 5:44pm

Hi all,

Daniele and I have worked through the issue. It seems to me that this is not terribly clear in the website documentation, so I will say it here. Your model must be in meters for it to work correctly in Pachyderm. Maybe someday I will fix this, but for now, in order to prevent  an onslaught of bugs, please work in meters.

Rhino makes it pretty easy to fix this. I can be a little trickier in Grasshopper, but still not overly complicated.

kind regards,


Comment by Daniele Rizza on July 23, 2017 at 11:25am

Can you send me your email to send you the project?
Or write it at
Thank you

Kind regards,


Comment by Arthur on July 23, 2017 at 10:26am

Hi Danielle,

There are no limits, and your problem seems very different from Stracus's problem. His originated in the Scene class, and most likely had to do with his model. Yours, from your picture, occurs after running a simulation, and has to do with composing the Impulse Response.

I can't tell what is wrong with it from your picture. Please email me your files and I can have a look.

kind regards,


Comment by Daniele Rizza on July 23, 2017 at 9:44am

Hi Arthur,

Like Stracus, when I launch my analysis, appears an error that says "Index beyond the matrix limits".
Where is it possible change these limits?


Comment by Arthur on July 13, 2017 at 6:38am

There is no limit on the number of surfaces which can be handled, but if any of them cannot generate a render mesh, it may crash.

You will have to trouble shoot your model in order to make sure that none of the geometry is bad.

I don't understand your second question. Could you please explain?

Comment by Stracus on July 13, 2017 at 3:33am

Hi Arthur,

I am using your software for an acoustic simulation. Everything looks working in the grasshopper system but I have two questions. 

1. How many surfaces can Pachyderm control in Grasshopper? For now my project is not less then 3800 surfaces and everything is crashing when I am setting a polygon scene.

2. The parameter ED is always overload for the matrix. Is there any secret to solve this problem?

Many thanks


Comment by Sean L on June 7, 2017 at 4:25pm

Hi Arthur,

is there a way to export analyses from simulations in a spreadsheet-friendly (or otherwise parseable) format? 

Comment by daviduburke on May 27, 2017 at 6:52am


I made it through my Thesis project. Thank you for all your help and for creating this tool! You are saving the world...

Comment by Daniele Rizza on May 27, 2017 at 2:45am

Hi Arthur,

Do you have any GH acoustics file that I can study to learn to use parametric pachyderm?
Thank you


Comment by Daniele Rizza on May 18, 2017 at 3:44pm

Hi Arthur,
I have the last version of Rhinoceros and Pachyderm so this is not the problem. Maybe my libraries are blocked but I don't know how I can unlock it.
This evening I tried to start the analysis in a simple cubic room and the "calculation solution" started. Maybe my last model was too complicated. It is possibile? 
I'll write you as soon as try to remodel the new room.
Thank you



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