Jess,

Perhaps the best way to make a 3D grid of data is to use the nrrd file format.  Creating a nrrd is quite simple

What is the easiest way to create a nrrd file? This has never been quite clear to me, even after reading the documentation. Is there a tool to assist this process?

Thanks,
Chris

and it can be used to better control the geometric information of the grid, such as spacing, size, and origin.  This file format can be read in to SCIRun as a LatVol using the ReadField module and used in many ways.  There are also many module designed specifically for use with nrrd file formats in SCIRun.  Please refer to the http://teem.sourceforge.net/nrrd for more info on the nrrd format.  

cheers,

Jess

On Jun 20, 2013, at 8:49 AM, Carlos Garavito <carlosgaravito@gmail.com> wrote:

Hi,

I am working with a structured grid and I would like to assign colors to each voxel/cell using an external file which have some numerical values.

I was wondering how to use this in SCIRun I am aware about the read and write field methods but the format is not clear.

I will really appreciate any help with the formats in this case.

Best