POV-Ray : Newsgroups : povray.general : Blurred reflections : Re: Blurred reflections Server Time
6 Aug 2024 06:19:48 EDT (-0400)
  Re: Blurred reflections  
From: Warp
Date: 8 Jul 2002 14:26:48
Message: <3d29d968@news.povray.org>
Hugo <hua### [at] post3teledk> wrote:
> I'll try again then. I was only talking about the reflection tricks without
> Megapov. Lets say you average 5 normals, using the bump pattern scaled very
> big. Then you have 5 normals, but their directions are random..

> Example: You apply the blur texture on a plane and put a white sphere above
> it, that is supposed to be reflected on the plane, and use a black
> background.. The result with 5 averaged normals is not 5 eqaul steps between
> black/white. Because the bump patterns have random values (psudo-random, to
> be precise).

  With 5 blur samples MegaPov would shoot 5 reflected rays to random
directions for each pixel. This doesn't give any better result (just an
extremely grainy one).
  You can simulate the same effect by scaling the normal very small in the
trick.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -


Post a reply to this message

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