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From: Lawrence W
Subject: Re: flowering dandelion
Date: 30 Oct 2014 11:15:00
Message: <web.545255d371cc5ccfae2ccffa0@news.povray.org>
"s.day" <s.d### [at] uelacuk> wrote:
> Added the option to have flowers as well as seeds/clock's maybe a bit too bright
> on the colour for the flower and I think I need to randomise the petals a bit
> more (have the odd ones slightly more curved) but it is nearly complete.
>
> I will upload a new version of the macro once I am happy with it.
>
> Sean

Hasn't anyone told you?  You're not allowed to post photos to this site.  ;)
These dandelions are absolutely incredible.  I love the color variation on the
stalks and leaves.  You could have skipped the randomization on the petals and
you'd never know because of the coloring.  Awesome work.


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From: jhu
Subject: Re: flowering dandelion
Date: 30 Oct 2014 22:05:01
Message: <web.5452ee4071cc5ccfd19b0ec40@news.povray.org>
That's amazing SDL work there.


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From: Nekar Xenos
Subject: Re: flowering dandelion
Date: 31 Oct 2014 14:29:55
Message: <op.xolxn1hsufxv4h@xena.home>
On Thu, 30 Oct 2014 17:14:27 +0200, Lawrence W <lwi### [at] gmailcom>  
wrote:

> "s.day" <s.d### [at] uelacuk> wrote:
>> Added the option to have flowers as well as seeds/clock's maybe a bit  
>> too bright
>> on the colour for the flower and I think I need to randomise the petals  
>> a bit
>> more (have the odd ones slightly more curved) but it is nearly complete.
>>
>> I will upload a new version of the macro once I am happy with it.
>>
>> Sean
>
> Hasn't anyone told you?  You're not allowed to post photos to this  
> site.  ;)

I must say, you have done some very good Photoshop background removal.

;-)

-- 
-Nekar Xenos-


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From: Sean Day
Subject: Re: flowering dandelion
Date: 31 Oct 2014 20:13:49
Message: <545425bd@news.povray.org>
Lawrence W wrote:
> "s.day" <s.d### [at] uelacuk> wrote:
>> Added the option to have flowers as well as seeds/clock's maybe a bit too bright
>> on the colour for the flower and I think I need to randomise the petals a bit
>> more (have the odd ones slightly more curved) but it is nearly complete.
>>
>> I will upload a new version of the macro once I am happy with it.
>>
>> Sean
>
> Hasn't anyone told you?  You're not allowed to post photos to this site.  ;)
> These dandelions are absolutely incredible.  I love the color variation on the
> stalks and leaves.  You could have skipped the randomization on the petals and
> you'd never know because of the coloring.  Awesome work.
>

Thanks, the textures are pretty basic and are in the demo file uploaded, 
they don't look as good due to the poor quality of HDR probe I uploaded 
but a better probe would improve this if you have one.

Been away from my PC this week so have not made any changes to the files 
yet but will upload the flower version of the macros in the next few days.

Sean


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From: Sean Day
Subject: Re: flowering dandelion
Date: 31 Oct 2014 20:15:04
Message: <54542608$1@news.povray.org>
jhu wrote:
> That's amazing SDL work there.
>
>

Thanks, the dandelions turned out better than my recent attempt at 
modelling a flower using Sculptris and are more flexible as well.

Sean


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From: Bald Eagle
Subject: Re: flowering dandelion
Date: 31 Oct 2014 20:30:01
Message: <web.545428bf71cc5ccf5e7df57c0@news.povray.org>
Sean Day <s.d### [at] uelacuk> wrote:

> Thanks, the textures are pretty basic and are in the demo file uploaded,
> they don't look as good due to the poor quality of HDR probe I uploaded
> but a better probe would improve this if you have one.

Can you tell me to find a good introductory example of incorporating HDRI probes
into POV-Ray scenes is?
What makes a "good" probe?
Can I make my own HDRI probes with POV-Ray?


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From: Thomas de Groot
Subject: Re: flowering dandelion
Date: 1 Nov 2014 04:24:52
Message: <545498d4$1@news.povray.org>
On 1-11-2014 1:26, Bald Eagle wrote:
> Can you tell me to find a good introductory example of incorporating HDRI probes
> into POV-Ray scenes is?
> What makes a "good" probe?
> Can I make my own HDRI probes with POV-Ray?

Answer #1:
This is an example of a HDRI probe sky sphere. You can use .hdr or .exr 
formats. The latter is best I believe:

   sphere {
     0, 10e3
     texture {
       pigment {
         image_map {
             exr   "HDRI maps\SM_HDRI-Pack3-24.exr"
             map_type 1
           once
           interpolate 2
         }
         rotate Sun_azm*y
       }
       finish {emission 1 diffuse 0}
     }
     hollow
   }

Answer #2:
Not sure but any probe with a well-defined light source areas will do I 
believe. I leave this answer to the specialists here though ;-)

Answer #3:
You can find ready made probes for instance here:
http://smashmethod.deviantart.com/art/High-Res-HDRI-Map-Pack-1-9597501
There are three packs in total. If you want, you can the .hdr maps into 
.exr maps using Ive's IC application.

You can also make excellent sky sphere panes using Terragen Classic and 
just render the sky, not the landscape. The rendered panes can then be 
composited into probes with the help of Ive's TerragenSky_v2.inc macro. 
It's been a long while since I used that but it gives excellent results. 
Note: this only works with Terragen Classic, not with Terragen 2.

Thomas


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From: s day
Subject: Re: flowering dandelion
Date: 1 Nov 2014 19:50:01
Message: <web.5455713371cc5ccfd48fb1cd0@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
> Can you tell me to find a good introductory example of incorporating HDRI probes
> into POV-Ray scenes is?
> What makes a "good" probe?
> Can I make my own HDRI probes with POV-Ray?

Adding HDR is really as simple as searching for free HDR probes (there are
lots), download it and add something similar to below to your scene:

sphere  { 0 1 hollow
pigment{ image_map{ hdr "Portsmouth_Probe.hdr" map_type 1 interpolate 2 } }
finish { ambient 1 diffuse 1 emission 3} // use emission to control brightness
scale 4000
no_image // only if you don't want the probe visible
}

However, if using HDR then radiosity becomes pretty much essential or the effect
will not be any good.

I generated a couple of probes many years ago using megapov I recall seeing
something about outputting HDR format from Pov but to be honest unless you have
a great scene it will not compete with a HDR probe generated by taking
photographs.

Sean


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