POV-Ray : Newsgroups : povray.binaries.images : PoVEarth, day #9 : Re: PoVEarth, day #9 Server Time
1 Aug 2024 10:12:39 EDT (-0400)
  Re: PoVEarth, day #9  
From: Reactor
Date: 4 Sep 2008 02:30:01
Message: <web.48bf7f8a3f41c8c05f180b2a0@news.povray.org>
Rendered view 13, command line: +w1024 +h768 +a0.2 +am2 +r4
Took approx 25 minutes on a P4 3.0GHz
Radiosity settings as below, other settings were the changes I recommended in
the previous post.

#declare radbri = 1.50;

radiosity{
    pretrace_start 100/image_width  // start pretrace at this size
    pretrace_end     1/image_width  // end pretrace at this size
    //adaptive 1                   // MegaPov 1.2.1 only
    count 100                      // higher -> higher quality (1..1600) [35]
    nearest_count 20               // higher -> higher quality (1..10) [5]
    error_bound 0.5                // higher -> smoother, less accurate [1.8]
    recursion_limit 5              // how much interreflections are calculated
    low_error_factor .25           // reduce error_bound during last pretrace
step
    gray_threshold 0.80            // increase for weakening colors (0..1) [0]
    minimum_reuse 0.0015           // reuse of old radiosity samples [0.015]
    brightness radbri              // brightness of radiosity effects (0..1) [1]
    adc_bailout 0.01
    //save_file "povworld.rad"
    always_sample off             // turn sampling in final trace off [on]
  }



Note that there are artifacts in the corners that can be corrected by boosting
count, but I didn't want to wait for it.  Perhaps MegaPov's adaptive error
bound could help here also, but I've never had much luck with it.  I am still
experimenting with view 0, but I expect the settings to be similar.  The main
difficulty that I am encountering is that some of the windowsills that have the
interior diffuse settings receive direct light, and as a result are brighter
than they should be.

-Reactor


Post a reply to this message


Attachments:
Download 'povworld_radb1.50.png' (90 KB)

Preview of image 'povworld_radb1.50.png'
povworld_radb1.50.png


 

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