[Radiance-general] Modeling a cloud

[Greg Ward]

Thanks for sharing, Mark.  I'm always delighted to see someone figure out how to do something with Radiance that I have no idea how to do, myself!

Cheers,
-Greg

> From: Mark Stock <mstock at umich.edu>
> Subject: Re: [Radiance-general] Modeling a cloud
> Date: February 23, 2015 11:36:28 AM PST
> 
> Eduardo,
> 
> I have done some experimentation with clouds in Radiance, and there
> are two ways that seem to work.
> 
> One is to define a closed cloud volume and apply the "mist" material
> to it. This mesh must be closed, watertight, and non-intersecting, and
> will appear to be of constant "cloud" density. It helps considerably
> if it's in the shape of a cloud. It can look something like this:
> http://markjstock.org/graphics/ray/clouds04.jpg
> 
> The other method allows varying density throughout the cloud, but is a
> lot more work. It consists of creating a large number of small,
> non-overlapping cubes (a dense matrix of cubes with small spaces
> between them), each with a different mist material applied to them.
> http://markjstock.org/transfer/img2_00.jpg
> http://markjstock.org/transfer/img3_01.jpg
> 
> These options seemed to create the most cloud-like volumes (with
> clouds of size 1 and mist "voxels" of size ~0.01):
> -ma 0.95 0.95 0.95 -mg 0.05 -ms 0.001
> 
> Mark
> 
> 
> On 2/22/15, Eduardo Artigas <eduardoartigas at yahoo.es> wrote:
>> Hi guys!
>> I am a student  of a course about Radiance so I am quite new with the
>> software. I looking for information an existing model of a cloud so I would
>> like to analyses it and maybe i will try to improve it or to develop
>> something similar.
>> I hope that someone could help me!
>> Best Regards
>> Eduardo Artigas