POV-Ray : Newsgroups : povray.binaries.images : Attempt at realistic skin textures : Re: Bump Mapping Server Time
30 Jul 2024 16:24:24 EDT (-0400)
  Re: Bump Mapping  
From: clipka
Date: 15 Mar 2012 15:55:57
Message: <4f62494d@news.povray.org>
Am 15.03.2012 20:53, schrieb clipka:
> Am 16.02.2012 15:46, schrieb clipka:
>> Am 14.02.2012 08:53, schrieb Thomas de Groot:
>>
>>>> Don't worry about it: You can't get it right anyway, due to a known
>>>> problem with POV-Ray's implementation of UV-mapped image-based bump
>>>> maps. Unfortunately, fixing it isn't exactly trivial.
>>>
>>> Ah? Interesting to hear this. I hope (I know!) you will find a solution.
>>
>> My last attempt to fix it came at the cost of scrambling all
>> non-UV-mapped bump maps instead, for reasons I didn't quite understand
>> :-P
>>
>> But be sure I'll try again; it's one of the things that currently bug me
>> most about POV-Ray.
>
> Okay, here's a quiz to all of you: Please describe the surface structure
> of this thing. Are those dimples or pimples? (Hint: The light comes
> almost straight from the camera position.)
>
> (Rendered with POV-Ray 3.7.RC5 using a plain old non-uv-mapped bump_map;
> POV-Ray 3.6 gives the same results.)

... and now with some patch.


Post a reply to this message


Attachments:
Download 'bump_map_types.png' (440 KB)

Preview of image 'bump_map_types.png'
bump_map_types.png


 

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.