Anybody knows how to model a human brain with Rhino?


#1

I’ve been looking for some tips to start this human brain project. If anybody has any resources for this please let me know!!!

arbaje240@gmail.com


How to create birds nest or similar? - possibly without grasshopper
(Menno Deij - van Rijswijk) #2

Maybe these guys can tell you more on how to model a brain https://www.humanbrainproject.eu

Seriously though, this site has meshes of brain in various formats. The .obj files should load into Rhino.


#3

Can you turn into Nurbs this brain mesh?


(Wim Dekeyser) #4

It might be possible though not easy.

Start with the help file. Make sure you read the warning on that page!
Additionally, there a few plugins that help doing this; Rhinoreverse and RhinoResurf come to mind. You can try these before buying.

But the big question is WHY? What are you hoping to achieve by doing that?


#5

weird that nobody has gone through this task in rhino/////


#6

This sounds like a fun project : )


#7


#8

this is awesome!!! Can you perhaps explain the process?


#9

@CarterTG love the file naming :slight_smile:


#10

The model above was started in Windows Rhino where the base reference surface was effortlessly created with T-Splines.

I chose to re-do this in Rhino OSX (Wenatchee 519) to test how far it’s advanced and also as a challenge to be gimped without T-Splines.

Starting with a nurbs Sphere…


#11

Cage Editing used in approximating the shape…


#12

Further Cage Edit gets a mediocre likeness of one hemisphere


#13

Lay in a plane of points BY HAND to achieve a non-uniform organic look…


#14

Flow those points to the reference surface


#15

Point snap enabled, lay down an undulating Interpolated Point Curve. Yes, this is one continuous closed curve. NONE of it crosses over on itself while keeping a certain amount of spacing.


#16

Pipe the closed curve with a radius large enough to occupy any gaps


#17

Mirror and butt the hemispheres together


#18

really appreciate this. Did you do that continuous line by hand clicking each point you wanted individually?


#19

Yes. You’ll need to experiment with how much spacing needs to exist between a neighboring curve in addition to the results of skipping points. Lock all the flowed points on their own layer so that you’ll always be able to go back and try a new set of curves.

It’ll also help to place a PictureFrame reference in the back to serve as a rough spacing guide. The very first image at the start used such a guide. The 2nd model done in Rhino OSX was breezed through without a reference guide and thus the curves/pipes turned out more dense.

Final tip would be to quadruple the amount of points. This provides a denser point cloud for finer control when snapping the curve to.


(David Cockey) #20

Any particular reason not to skip the points and draw the curve directly on the surface with InterpCrvOnSrf?