POV-Ray : Newsgroups : povray.binaries.images : Blurred reflection comparison : Re: Blurred reflection comparison Server Time
23 Feb 2024 03:09:56 EST (-0500)
  Re: Blurred reflection comparison  
From: Mike Horvath
Date: 12 Feb 2018 22:11:42
Message: <5a82576e@news.povray.org>
On 2/12/2018 5:05 PM, clipka wrote:
> Am 12.02.2018 um 22:27 schrieb Mike Horvath:
> 
>>> You need:
>>>
>>> (1) A way to randomize the reflection. A `normal` statement with a very
>>> small scale does nicely.
>>>
>>> (2) A way to force POV-Ray to shoot a high number of rays per pixel
>>> where the randomized reflection is. A small bit of focal blur (with high
>>> quality settings) does nicely.
>>>
>>> Together this gives you nice blurred reflections at a (hopefully)
>>> reasonable speed.
>>>
>>
>> Is this random normal good?
> 
> It should do the job. Note that since you're only using one copy of the
> bumps normal, there's no need to translate the texture by a random amount.
> 
> Also, I'm not sure whether the average normal_map construct will give
> you the desired result, or whether you should instead use a sequence of
> `normal` statements. See tutorial section 2.3.5.2.2, "Blending Normals".
> 

Very nice, thank you.


Mike


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