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 CAD / Ray-Tracing / 1975
1974  |  1976
Subject: 
Re: trans black holes
Newsgroups: 
lugnet.cad.ray
Date: 
Thu, 4 Sep 2003 17:27:14 GMT
Viewed: 
1975 times
  
"Tom Bozzo" <abozzo*nospam@midplains.net> wrote in message
news:HKo0z5.204y@lugnet.com...
In lugnet.cad.ray, Gregory J. Overkamp wrote:
One thing i found helps to eliminate these artifacts is to increase the • max
trace level. Assuming you are using the most recent version of j de • haan's
radiosity files, this is quite easy.  Its the fifth option in the • series.  Try
5 like it recommends, but you can go up to 20 or even higher until this
disappears.  Hope that helps a little...

Increasing the value of max`_trace`_level did the trick for me.  Setting • it back
to 5 (the usual default) reduced but did not eliminate the artifacts for • me.
Setting it to 20 (as in the Raves library IIRC) or 25 (in Jeroen de Haan's • v1
radiosity files) was sufficient, if not necessarily efficient.

The max_trace_level is in the 2.3 version.

About the artifacts (or black spots): Willy Tschager did some tests with
intresting results and placed them on Brickshelf:
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=41136
The filenames "mtlX_XX_XX_XX.png" are stand ins for:
max_trace_level(statement)_(hours)_(minutes)_(seconds).png
As you can see higher mtl doesn't mean less artifacts. Also: be carefull
with MTL and LGEO; LGEO parts are not hollow (as LDraw files are) and will
make rendering much much slower.

Jeroen



Message is in Reply To:
  Re: trans black holes
 
(...) Increasing the value of max_trace_level did the trick for me. Setting it back to 5 (the usual default) reduced but did not eliminate the artifacts for me. Setting it to 20 (as in the Raves library IIRC) or 25 (in Jeroen de Haan's v1 radiosity (...) (21 years ago, 4-Sep-03, to lugnet.cad.ray, FTX)

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