Subject:
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Re: Muzzle flash in POV-Ray?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Tue, 7 May 2002 20:00:43 GMT
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Viewed:
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760 times
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In lugnet.cad.ray, Jeremy H. Sproat writes:
Replying to myself... again... :-,
One item I forgot to mention about my second code snippet (fire object from
icosahedron) is that it looked like dithered crap until I added the
"intervals" and "samples" values. There's several lessons in this:
1. When you add multiple media and/or multiple densities, you probably need
to crank up these values as the defaults are worthless. The values I used
seem to be absurdly high, and they took a long time to render, and the
result was *still* splotchy and dithered...leading me to point #2.
2. Even then, in order to get a smooth, nice-looking final image, you may
need to crank up the anti-aliasing (or render at a super-large resolution
then scale it down, e.g. in photoshop, virtually the same effect). My final
renderings had an AA threshold of 0.3, meaning that if there was a 30%
difference between neighboring pixels it would render the pixels "in
between" -- effectively doubling the resolution and quadrupling the
rendering time.
3. You need to read the ENTIRE POVRay manual -- cover to cover, in all its
badly-written glory -- in order to really understand what's going on...
there are very few decent tutorials out there, especially for 3.1 features
such as media. This, I know from personal experience. :-P
Cheers,
- jsproat
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Message is in Reply To:
 | | Re: Muzzle flash in POV-Ray?
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| (...) I have two quickies: the quick way and the long way. (Note that both examples were written towards POVRay version 3.1g...) ... The quick way: Here's what I wrote for the green laser bolts in my wallpaper "Flight". (1) This creates a 8x8x600 (...) (22 years ago, 7-May-02, to lugnet.cad.ray)
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