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Hi Mike,
>
> Or to the raytracing experts out there...what is it about those particular
> radiosity settings that make the results so realistic? What is needed to
> achieve this? I'm familiar with Pov-ray and familiar with the radiosity
> includes that Orion and others posted a while back, but my attempts somehow
> never reached that level of realism. Now I'm looking into creating some
> animations using PoV-Ray and need the best rad settings I can get my hands
> on. I'm willing to write it, but I really have no clue what I should be
> editing. Can someone help me out here?
I'm not an expert, but I've struggled long enough with it too. Here are some
questions & tips:
What version of the Ldraw radiosity includes do you have? I downloaded it
recently and it works quite all right. What settings are you using?
Pay special attention to color definition of the model. POV's radiosity is
highly dependent on the colors of the environment surrounding the models. Once
you move out of the white floor and standardish skysphere, you're pretty much on
your own. And remember that anythig with an ambient setting of more than 0 will
tend to "glow" in a radiosity scene.
Using lights with radiosity might also help (remember to use area lights in the
final rendering to get softer shadows). Traditional lightning parlance is only
relatively applicable to radiosity settings, but reading up on it will not
hurt.I learned quite a bit from the book "Digital Lighting & Rendering". Check
out the author's lightning tutorials here:
http://www.3drender.com/light/index.html
Finally, just a reminder of some of the most important POVray radiosity settings
are
Count - the higher the better, and the longer it takes 300 is not unheard of
error_bound - lower = more detail - .3 will send most computers to limbo for a
looooong time
max_trace_level - will reduce artifact created by low count values
recursion_limit - this offers some degree of control over the key-to-fill ratio
(the contrast ratio between illuminated areas and shadows - or the difference
between the KEY light and the FILL light). Lower numbers (1) offer higher
contrast (i.e. dark-er shadows) Take a look at the radiosity tutorial in POVray
help.
K - that's all I can offer for now
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Message is in Reply To:
 | | Any Stinkers here?
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| I'm not calling names...I'm looking for someone who has a Brickshelf account under the username "Stinky". Can the person who lays claim to that name please contact me? I have a few questions to ask you about the radiosity stuff you've done here: (...) (21 years ago, 10-Dec-03, to lugnet.cad.ray, lugnet.general)
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