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On 04/26/2013 07:32 AM, James Holsenback wrote:
> On 04/25/2013 11:53 PM, Ray wrote:
>> Stephen <mca### [at] aol com> wrote:
>>> On 19/04/2013 10:41 AM, Ray wrote:
>>>
>>> Also somewhere on the net there is a utility called tga2df3.exe will
>>> convert a tga file to df3.
>>>
>> I have done this: I extracted each slice of data from the 3D matrix
>> (that is
>> each slice is a 2D array and all such slices combined to give a 3D
>> matrix). Then
>> I output each slice of data as a gray level picture and converted all
>> of those
>> images into TGA format. Next, I combined all my tga images into a .df3
>> file
>> format and rendered it with following code:
>>
>> global_settings { assumed_gamma 1 }
>> background { rgb 1 }
>> camera {direction z*8 location <0,0,-10>}
>> light_source { <20,40,10>, 1 }
>>
>> sphere // transparent sphere containing media
>> { 0,1 pigment { rgbt 1 } hollow
>> interior
>> { media
>> { absorption 5
>> density
>> { density_file df3 "a1.df3" interpolate 1
>> color_map{ [0 rgb 0]
>> [0.4 rgb <1,0,0>]
>> [0.8 rgb <1,1,0>]
>> [1 rgb 1]
>> } }}}}
>>
>> But the result showed a very strange shape. I changed the camera
>> location, still
>> no smoke shape displayed. I really have no idea what's wrong with
>> that. The TGA
>> image seems correct. I attached one of the TGA images and two images
>> of result
>> with different camera location. Any ideas what my problem might be?
>> Thank you,
>> Ray
>>
>
> I don't see light_source enabled to support media_interaction ... also
> wondering why you used absorption media. Try scattering instead. Perhaps
> background should be something other than pure white ... for a little
> contrast (make the smoke easier to see)
oops ... should have checked before posting media_interaction is on by
default
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