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"P Brewer" <pbj### [at] wowway com> wrote:
> My wife and I do some amateur photography, and have done a good job of
> decorating our house with prints. The dining room has been an issue though.
> I would love to put a three or four panel image up showing a large solitary
> oak tree in winter, summer, fall, and spring. I can imagine it quite well,
> but can't seem to find a good subject despite always keeping my eyes open.
>
> I was thinking this weekend, heck, why not make my own reality. I'm getting
> the hang of semi photo-realistic renderings with lots of detail in POV. I
> may as well put it to good use.
>
> Here are the fruits of my labor so far. I think I've got something that's
> pretty close to realism for the focus of my image. I was hoping to get some
> criticism it.
>
> It's an xfrog model with texture maps applied. Rendered with a little
> radiosity and one light source. One problem I'm having is getting the look
> of filtered light through the leaves. I get some unrealistic dark spots
> under the canopy. Making the leaves partially transparent doesn't seem to
> do much unless I over do it. Then the leaves on the fringe are too
> transparent. Any ideas?
>
> Also, I mentioned above the 4 seasons idea. What can I do to differentiate
> spring from summer? I'd like 4 distinct images. I was thinking a foggy
> picture for spring with some small patches of snow?
Wow, very nice picture. I love the look of your tree, but I don't know how
to get better-looking leaf transparency. Good luck on that- although it
looks very believable to me right now. Perhaps faking it with a little
ambient (glowing in radiosity) on the leaves? --might look a lot worse
though. Or you could try a no_shadow fill light lighting only the tree
(light_group I think).
As for distinguishing seasons, in my neck of the woods grass is lighter and
greener in the spring, darker and browner in the summer. Also (as someone
said) you may be able to get leaf buds in the spring, and smaller leaves,
maybe some acorns (If it's a good POV-year :) that fall to the ground in
summer. Mostly I think of the lighter green and flowering in the spring, if
there are any other plants in the picture.
(off-topic) I downloaded the source to your image from last IRTC and have
been playing with it- your rust textures are really, really good (and
clever). Amazing work.
I bet that tree-radiosity took a while, eh?
Looking very good, good luck!
-Stefan
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On Mon, 23 Oct 2006 19:16:57 -0400 P Brewer wrote:
> My wife and I do some amateur photography, and have done a good job of
> decorating our house with prints. The dining room has been an issue though.
> I would love to put a three or four panel image up showing a large solitary
> oak tree in winter, summer, fall, and spring. I can imagine it quite well,
> but can't seem to find a good subject despite always keeping my eyes open.
>
> I was thinking this weekend, heck, why not make my own reality. I'm getting
> the hang of semi photo-realistic renderings with lots of detail in POV. I
> may as well put it to good use.
>
> Here are the fruits of my labor so far. I think I've got something that's
> pretty close to realism for the focus of my image. I was hoping to get some
> criticism it.
>
None from me. It is really great!
> It's an xfrog model with texture maps applied. Rendered with a little
> radiosity and one light source. One problem I'm having is getting the look
> of filtered light through the leaves. I get some unrealistic dark spots
> under the canopy. Making the leaves partially transparent doesn't seem to
> do much unless I over do it. Then the leaves on the fringe are too
> transparent. Any ideas?
>
> Also, I mentioned above the 4 seasons idea. What can I do to differentiate
> spring from summer? I'd like 4 distinct images. I was thinking a foggy
> picture for spring with some small patches of snow?
In summer I expect a tree with lots of green leafs. In spring I expect
small leafs with buds. In winter: If therer were leafs I were in Florida.
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"P Brewer" <pbj### [at] wowwaycom> wrote:
> Also, I mentioned above the 4 seasons idea. What can I do to differentiate
> spring from summer? I'd like 4 distinct images. I was thinking a foggy
> picture for spring with some small patches of snow?
How about flowers on the tree for the spring picture?
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I appreciate everyone's input. I will have some time later this week to try
some things out and I'll post an update of what came out of it.
Once again, thanks!
-Phil
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P Brewer nous apporta ses lumieres en ce 23/10/2006 18:16:
>
> Also, I mentioned above the 4 seasons idea. What can I do to differentiate
> spring from summer? I'd like 4 distinct images. I was thinking a foggy
> picture for spring with some small patches of snow?
>
>
> ------------------------------------------------------------------------
>
In spring the leaves are a little smaller and a somewhat lighter green.
During the sumer, the leaves grow a darker green, maybe with sume blueish
shadeing. They are full grown and more opaque.
Longer shadows in spring, shorter ones for sumer.
--
Alain
-------------------------------------------------
"The fact that windows is one of the most popular ways to operate a computer
means that evolution has made a general fuckup and our race is doomed."
-- Anon.
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Neddahk nous apporta ses lumieres en ce 24/10/2006 12:52:
> "P Brewer" <pbj### [at] wowwaycom> wrote:
>> Also, I mentioned above the 4 seasons idea. What can I do to differentiate
>> spring from summer? I'd like 4 distinct images. I was thinking a foggy
>> picture for spring with some small patches of snow?
> How about flowers on the tree for the spring picture?
It's an oak. It don't have flowers as we usualy expect them: they are the same
green as the leaves and tiny. The male flowers cast LOTS of polen that is caried
by wind and caught by the somewhat sticky female flowers.
--
Alain
-------------------------------------------------
Caught Asleep At Your Work Desk
Just in case your boss catches you asleep at your desk, be ready to blurt out
this excuse #1: I was working smarter - not harder.
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> ...One problem I'm having is getting the look
> of filtered light through the leaves. I get some unrealistic dark spots
> under the canopy. Making the leaves partially transparent doesn't seem to
> do much unless I over do it. Then the leaves on the fringe are too
> transparent. Any ideas?
Beautiful work. I'm really enjoying the recent tree images here--yours and
the one posted by Neddahk.
I don't know much about X-Frog, so I don't know what kind of leaf objects it
creates. If they are simple triangle patches--that is, just a "flat" front
and back surface--you might try adding double_illuminate to them. That
worked for me when I made some similar leaf objects in sPatch. It allowed
some light to filter through.
Ken W.
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>
> I don't know much about X-Frog, so I don't know what kind of leaf objects it
> creates. If they are simple triangle patches--that is, just a "flat" front
> and back surface--you might try adding double_illuminate to them. That
> worked for me when I made some similar leaf objects in sPatch. It allowed
> some light to filter through.
>
> Ken W.
Ken,
There are a lot of options for what to make the leaves out of, but I'm using
a flat mesh object similar to what you stated. I have the leaves tagged as
double_illuminate, but the leaves that don't get direct light hitting them
don't benefit from the tag regardless.
I have had some time to play with the lighting and found some ambient added
to the leaves to be the trick. I'll post a comparison this evening, as well
as the latest tree model I've come up with.
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Here's a comparison of my original lighting along with added .45 ambient.
Still working on a better tree model. It's so hard to come up with
something that looks really good without murdering memory resources. I'm
currently using up around 350MB of memory on the one tree and I'm worried
it'll really limit my final scene flexibility.
Post a reply to this message
Attachments:
Download 'comparison.jpg' (300 KB)
Preview of image 'comparison.jpg'
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"P Brewer" <pbj### [at] wowwaycom> wrote:
> Here's a comparison of my original lighting along with added .45 ambient.
A noticeable improvement! The ambient value, added (I assume) to the ambient
"glow" in radiosity, really did the trick. I'll have to remember that for
my own tree scenes.
You had asked about how to differentiate the seasons: I would actually try a
slightly different light color for each (and a different light direction.)
It may not happen in reality, but I think we've become attuned to "seeing"
things differently in different seasons. Cool crisp blue for winter,
perhaps at a 45-degree angle; slightly yellowish (with some haze) and
directly overhead for summer, etc. Fall might be late afternoon (and thus
late-setting sun, yellow/orange.) A bit of visual (and emotional)
manipulation, but I don't think we'd notice the "technique." :-)
Ken
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