# Nautilus Reaction Diffusion extended

**URL:** <https://discourse.mcneel.com/t/nautilus-reaction-diffusion-extended/203136>\
**Category:** Grasshopper\
**Tags:** windows, grasshopperrhino, reaction-diffusion, nautilus\
**Created:** [April 16, 2025, 12:25am UTC](https://discourse.mcneel.com/t/nautilus-reaction-diffusion-extended/203136 "2025-04-16T00:25:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ali\_alhussain](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ali_alhussain/32/666941_2.png) [@ali\_alhussain](https://discourse.mcneel.com/u/ali_alhussain)\
**Post date:** [April 16, 2025, 12:25am UTC](https://discourse.mcneel.com/t/nautilus-reaction-diffusion-extended/203136/1 "2025-04-16T00:25:21Z")

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Hello everyone,

I am creating a grasshopper definition that creates reaction diffusion patterns based on structural stresses. I am using (Reaction Diffusion On mesh component) from [Nautilus](https://www.food4rhino.com/en/app/nautilus?lang=it) plug-in to do the reaction-diffusion patterns, and it is working as expected. However, If I wanted to vary parameters based on vertecies so I used another component in the same plug in (Reaction Diffusion extended). However, I keep getting weird results on my mesh which looks like a consistant noise as in the images.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/f/3/2/f326458563114142566c9a9ccb4b509ad3cb7894.png)

Here is a picture of the problem I a mhaving

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/5/8/c/58cb3e01e94ff31256b7625fec05ed53c4a3a98e.jpeg)

and here is a picture of the expected results using the standard Reaction Diffusion On mesh component

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/3/2/0320a03a30948ceb6fd6a01e0d3fbe662524fb55.jpeg)

By the way the plug-in is amazing and it keeps surprising me with its capabilities.

I attached my internalized grasshopper file for reference:  
[Reaction diffusion question.gh](https://discourse.mcneel.com/uploads/short-url/vE2oeXHQh1KSnKVtF41DLU2Mgca.gh) (62.5 KB)

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**Author:** ![laurent\_delrieu](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/laurent_delrieu/32/601605_2.png) [@laurent\_delrieu](https://discourse.mcneel.com/u/laurent_delrieu)\
**Post date:** [April 16, 2025, 6:18am UTC](https://discourse.mcneel.com/t/nautilus-reaction-diffusion-extended/203136/2 "2025-04-16T06:18:32Z")

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Hello  
It is on purpose. This component need a license. Like all components eith a yellow square on icon. I will add a message to tell the user like on some other components  
This component could be useful if you want to have values for A B … on each vertex value.

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<div class="post-metadata">

**Author:** ![ali\_alhussain](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ali_alhussain/32/666941_2.png) [@ali\_alhussain](https://discourse.mcneel.com/u/ali_alhussain)\
**Post date:** [April 22, 2025, 10:13pm UTC](https://discourse.mcneel.com/t/nautilus-reaction-diffusion-extended/203136/3 "2025-04-22T22:13:35Z")

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Thanks Laurent,

I was confused because there was no message like the other components.

Anyway, thanks for this awesome work!