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On 2/12/2018 1:21 PM, clipka wrote:
> Am 12.02.2018 um 14:08 schrieb Mike Horvath:
>> I still don't understand how I'm supposed to achieve the blurred
>> reflections possible in UberPOV by just using a little focal blur.
>> Compare the two attached images - especially the reflections in the
>> circled parts.
>
> Focal blur is just part of the equation.
>
> 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?
#declare BlurAmount = 0.2*2; // Amount of blurring, double BlurAmount
since it's used in an average
#macro BlurredReflectionRandNormals(InPigment, InFinish, InNormal)
// texture
// {
#declare S = seed(0);
pigment { InPigment }
finish { InFinish }
normal
{
average
normal_map
{
[1 bumps BlurAmount translate <rand(S),rand(S),rand(S)>*100 scale 0.001]
[1 InNormal]
}
}
// }
#end
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