Running through some of the sample scenes, there seems to be some scenes
which render differently. It looks like there was a change to one of the
patterns. (?)

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Mike Raiford wrote:
> 
> Running through some of the sample scenes, there seems to be some scenes
> which render differently. It looks like there was a change to one of the
> patterns. (?)

Could you please be a little more specific as to which scenes you feel are
rendering differently?

-- 
Ken Tyler - POV-Ray Technical Assistance Group

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"Ken" <tyl### [at] pacbellnet> wrote in message
news:4022ED21.6C9E5181@pacbell.net...

> Could you please be a little more specific as to which scenes you feel are
> rendering differently?


arches.pov would be one.

I noticed glasschess.pov looks slightly different as well, but this could be
caused by changes in the way refraction is handled when two surfaces meet.
There are others, but I can't think offhand. I know some of the scenes that
use glass in certain contexts (wineglass, lamppost, grenadine), look
different. I've posted on p.bt.b a rendering of Arches under both versions
of the raytracer.

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Michael Raiford wrote:
> 
> "Ken" <tyl### [at] pacbellnet> wrote in message
> news:4022ED21.6C9E5181@pacbell.net...
> 
> > Could you please be a little more specific as to which scenes you feel are
> > rendering differently?
> 
> arches.pov would be one.
> I've posted on p.bt.b a rendering of Arches under both versions
> of the raytracer.

There is definitely a difference between the two versions.  As far as I
know there really shouldn't be that much change in the normal patterns
to cause that big of a difference.

-- 
Ken Tyler

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"Ken" <tyl### [at] pacbellnet> wrote in message
news:40245AA7.BF476149@pacbell.net...
>
> > "Ken" <tyl### [at] pacbellnet> wrote in message
> > news:4022ED21.6C9E5181@pacbell.net...
> >
> There is definitely a difference between the two versions.  As far as I
> know there really shouldn't be that much change in the normal patterns
> to cause that big of a difference.

Oh wow... there's got to be a bug in the code. I tried arches.pov with a
number_of_waves setting (for the global_settings) to see how it would vary
the pattern and it was all over the place in how it rendered each time. For
example, first instance I used a value of 5 for that and it lost reflection.
Then began at 1 and rendered each time incrementing the value up by 1. When
it got to 5 again it had reflection but no wave patterns. Other numbers
either gave unpredictable results too.

-- 
Bob H.
http://www.3digitaleyes.com

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"Hughes, B." <omn### [at] charternet> wrote in message
news:4024778d$1@news.povray.org...
>
> number_of_waves setting (for the global_settings) to see how it would vary
> the pattern and it was all over the place in how it rendered each time.
For
> example, first instance I used a value of 5 for that and it lost
reflection.

Having checked it more since then I found that setting a number_of_waves
value, rendering, then rerendering a second time without making a change,
there'd be an expected water surface. Not the same as in version 3.5, but at
least the pattern looking more like it should instead of lacking any texture
(or reflection) or just having a rather featureless flat surface.

Plus there are occasional errors, i.e. "The POV-Ray rendering core threw an
unhandled exception", when larger numbers are used but not the same each
time (55, 100, etc.)

POV for Windows, WinXP

Bob H.

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In article <4022f541$1@news.povray.org>,
 "Michael Raiford" <mra### [at] hotmailcom> wrote:

> I noticed glasschess.pov looks slightly different as well, but this could be
> caused by changes in the way refraction is handled when two surfaces meet.

I seem to remember that in an earlier version, there was a coincident 
surfaces problem on the board squares. I thought it was fixed in 3.5 
though, so if you're seeing differences between 3.5 and 3.6...


> There are others, but I can't think offhand. I know some of the scenes that
> use glass in certain contexts (wineglass, lamppost, grenadine), look
> different. I've posted on p.bt.b a rendering of Arches under both versions
> of the raytracer.

That's got to be wrong...probably something's not getting initialized 
right.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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