Bah this newsreader! Had trouble posting images to usenet, but here they
are on my website (for now).

http://bur.st/~shevek/test_3.0.jpg
http://bur.st/~shevek/test_mega0.5.jpg
http://bur.st/~shevek/test_3.5.jpg

Thanks in advance for your kind help :)

Simeon


On Sat, 01 Feb 2003 23:21:44 +1100, Tim Nikias wrote:

> AFAIK, the noise-generator was changed from 3.1 to 3.5, not to mention
> the new one added to avoid some "plateaus" in number-distribution or
> what-not. I'm not so sure about thise topic, but I DO know that the new
> noise-generator is default in 3.5, and AFAIK you have to set that
> manually to overcome the problem, just a #version won't help.
> 
> But that's just a guess, so don't blame me if I'm wrong! :-)
> 
> Regards,
> Tim
> 
> 
> --
> Tim Nikias
> Homepage: http://www.digitaltwilight.de/no_lights/index.html Email:
> Tim### [at] gmxde
> 
>> /*
>> I find the following texture renders markedly differently in 3.5
>> compared with both 3.0.20-10 debian and megapovplus 0.5.0.2.5a-1 (3.1
>> equivalent), which both render the images similarly to each other.
>>
>> It looks to me like the grade between 0 and 1.0 in the texture map of
>> the older versions is quite different to the grade in 3.5 .. for
>> example as if one used a linear gradient and the other an exponential
>> one. I hope someone understand what I mean.
>>
>> I don't see this mentioned in the documentation or in the bugs so far
>> listed in povray.general or povray.bugreports, or by googling old
>> usenet postings.
>>
>> I haven't played much with 3.5, but have checked that if I use a plain
>> pigment it is the same color.
>>
>> Can someone tell me this is a bug, or is expected behaviour and why? If
>> so, how do i figure out how to translate an old-style texture into a
>> new one?
>>
>> I will post images to povray.binaries.images with the subject line
>> 'Texture maps different in 3.5 even when using #version'
>>
>> Simeon
>> */
>>
>> #include "colors.inc"
>> #version 3.0
>>
>> //test.pov
>> //bah there is some bug in the 3.5 textures i think //Simeon Scott
>> 2003-02-01 //////////////////////// //Something like a blue agate.
>> /////////////////////////////
>>
>>
>> background
>>   { color White }
>>
>> global_settings
>> {
>>   ambient_light 0.05
>>   assumed_gamma 1
>> }
>>
>> camera
>> {
>>   location <0, 0, -3>
>>   look_at <0, 0, 0>
>>   scale 0.2
>> }
>>
>> light_source
>>   {  <2, 4, -3> color White scale 0.4 }
>>
>> #declare Sim_Blue_Agate = texture
>> {
>>   waves
>>   texture_map
>>   {
>>     [  0.15 pigment { color White }        ] [  1.0  pigment { color
>>     <0, 0, 0.3> }  ]
>>   }
>>   turbulence <10, 10, 0.3>
>>   scale 0.1
>> }
>>
>> sphere
>>   {  <0, 0, 0>, 0.3 texture {  Sim_Blue_Agate } }

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