stbenge escreveu:
> nemesis wrote:
>> stbenge escreveu:
>>> "Out of the box," Blender's procedural texturing system is nowhere 
>>> near as powerful as POV-Ray's. I suppose if one were to write his own 
>>> shaders, and use scripting along with it, Blender's texturing system 
>>> may start to approach the level of POV's in terms of flexibility.
>>
>> Really?  As far as I played with it, it seems to share the same level 
>> of functionality, and quite a few more features.
> 
> More features like ambient occlusion, angle of incidence shaders and 
> other mapping features... yes. But as kike mentioned, you can't place 
> textures inside of textures. POV-Ray also has other pattern modifiers 
> which make life much easier....

>>> I can easily do in POV would prove to be very hard if not impossible 
>>> to do in Blender.
>>
>> Is this a challenge? ;)
> 
> If you want it to be :)

Shouldn't have asked... :P

>> If one can show me some difficult pov-only texture, I may try to 
>> reproduce it with Blender's procedurals alone once I get home... :)
> 
> Ok, you asked for it! :) Here's a little pattern I whipped up just now 
> in POV:
> 
> // Code
> // render with +w500 +h500
> 
> global_settings{assumed_gamma 2.2}
> 
> #default{finish{ambient 1}}
> 
> camera{
>  orthographic
>  right x*2 up y*2
>  location -z*100 look_at 0
> }
> 
> #declare native_motif=
> pigment{
>  gradient y triangle_wave
>  #declare V=0;
>  #while(V<1)
>   translate y*.75
>   rotate z*45.2
>   //rotate -z*45.1
>   scale .98
>   warp{repeat x*5 flip x}
>   #declare V=V+1/100;
>  #end
>  scale .1
> }
> 
> plane{z,-1
>  pigment{
>   native_motif
>   color_map{[0 rgb 0][.5 rgb<.5,.3,.1>][1 rgb 1]}
>  }
> }
> 
> // End Code

Tapestry!  yes, no way of doing that in Blender alone, particularly as 
it employs a loop to define further iterations to the warps... I could 
try to manually do those transforms, or perhaps learn how to script it 
with python... :/

>> On a side note, Blender also has an internal radiosity engine, along 
>> with a raytracer.
> 
> AFAIK, Blender only has ambient occlusion built in to its renderer. You 
> can color your object based on a sky texture (which actually looks 
> pretty good), but it's not true radiosity.

I'll do a test at home, but I'm pretty sure the tools in the Radio 
panels mean true radiosity baking.  They are separate from the occlusion 
pass.

> There is built-in support for 
> YAFRay, but (with the new releases of Blender) it has become difficult 
> to use, as you get no preview of the image as it renders. Plus YAFRay 
> doesn't support all of Blender's rendering options and materials... I 
> find using YAFRay a pain in the @ss, and usually opt to use POV-Ray if I 
> need radiosity.

Blender's internal renderer is becoming better and better.  It features 
a mix of scanline and raytracing, plus the ambient occlusion pass and 
radiosity.  I think only photon mapping and media are missing.  In the 
galleries, many incredible images are rendered internally...

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