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On 26-2-2019 19:48, MichaelJF wrote:
> Am 26.02.2019 um 11:15 schrieb Thomas de Groot:
>> On 24-2-2019 20:20, MichaelJF wrote:
>>> Hi Thomas,
>>> this time a didn't click accidentally into the image while converting
>>> it to jpg with the GIMP, but with purpose. In the marked area you can
>>> see the sharp edges I mean. The code was
>>>
>>> #if(SteamFog)
>>> #declare DensBoden1= density {
>>> agate
>>> agate_turb 1
>>> density_map {
>>> [ 0 rgb <1,1,1>/5 ]
>>> //[ 0.02 rgb <1,1,1> ]
>>> [ 0.03 rgb <0,0,0> ]
>>> [ 1 rgb <0,0,0> ]
>>> }
>>> }
>>>
>>> #declare DensBoden3= density {
>>> agate
>>> agate_turb 1
>>> density_map {
>>> [ 0 rgb <1,1,1>/5 ]
>>> //[ 0.02 rgb <1,1,1> ]
>>> [ 0.02 rgb <0,0,0> ]
>>> [ 1 rgb <0,0,0> ]
>>> }
>>> scale <5,50,5>
>>> //warp { turbulence <0.5,0.1,0.5> }
>>> //rotate <0,90,0>
>>> }
>>>
>>> #declare DensLuft = density {
>>> rgb <0,0,0>
>>> }
>>> box { <-150,0.001,-15>,<150.01,1,150> pigment { rgbt 1 } hollow
>>> interior {
>>> media {
>>> scattering { 2, White/5 }
>>> //absorption <0,0.25,1>
>>> //intervals 25
>>> samples 64
>>> density {
>>> gradient y
>>> density_map {
>>> [ 0 DensBoden1 ]
>>> [ 0.5 DensBoden1 ]
>>> [ 0.6 DensLuft ]
>>> [ 1 DensLuft ]
>>> }
>>> scale <1,2,1> translate <0,-0.5,0> // avoid
>>> repetition at height 1
>>> warp { turbulence <0.01,0.4,0.01> }
>>> }
>>> }
>>> media {
>>> scattering { 2, White/5 }
>>> //absorption <0,0.25,1>
>>> //intervals 25
>>> samples 64
>>> density {
>>> gradient y
>>> density_map {
>>> [ 0 DensBoden3 ]
>>> [ 0.5 DensBoden3 ]
>>> [ 0.6 DensLuft ]
>>> [ 1 DensLuft ]
>>> }
>>> scale <1,2,1> translate <0,-0.5,0> // avoid
>>> repetition at height 1
>>> warp { turbulence <0.01,0.3,0.01> }
>>> }
>>> }
>>> #if(GlobalFog)
>>> media { scattering {2, White/5 } density { rgb 0.001 } }
>>> #end
>>> }
>>> }
>>> #if(GlobalFog)
>>> box { <-100,1.001,-5.9>,<100,25,130> pigment { rgbt 1} hollow
>>> interior {
>>> media { scattering {2, White/5 } density { rgb 0.0001 } }
>>> }
>>> }
>>> #end
>>> #end
>>>
>>> GlobalFog was activated. May be I have overlooked some thing or the
>>> other.
>>>
>>
>> My first tests of your code confirms me that the sharp edge is the
>> result of the container boundary, not of any different behaviour of
>> density.
>>
>> I want to test different options yet.
>>
> Hm,
> the problem seems to be within the second media statement (the first
> produces some ground noise only). The container boundary is at level y=1
> (y is up here). The transition between DensBoden3 and DensLuft(=nothing)
> is between 0.5 and 0.6 scaled to 1 and 1.2 but then translated to 0.5
> and 0.7 which is beneath the container boundary for sure.
>
I have yet to test the second media I confess. ;-)
Something interesting to do [hint] is to put the density scale /after/
the warp{turbulence}. Makes things a bit complicated but worth the
experiment.
--
Thomas
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