I built this cart in XSI but decided to see what POVRay would do with it. I
had to change the road look because of differences in texturing systems and
the fact that part of my textures in XSI are not tillable. I had to fix
that for POVRay which I will use in XSI as well.

I still need to do a lot of work on lighting. POVRay is clearly slower so it
is taking me more time to tweak the radiosity and light values. In this
rendering I have radiosity too bright. My am is to match the output of
MentalRay as close as possible. The cart still needs sides and something to
be pulling it. And some cargo. Hay probably.

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Attachments:
Download 'cart.jpg' (195 KB)

Preview of image 'cart.jpg'

"m1j" <mik### [at] hotmailcom> wrote:
> I built this cart in XSI but decided to see what POVRay would do with it. I
> had to change the road look because of differences in texturing systems and
> the fact that part of my textures in XSI are not tillable. I had to fix
> that for POVRay which I will use in XSI as well.
>
> I still need to do a lot of work on lighting. POVRay is clearly slower so it
> is taking me more time to tweak the radiosity and light values. In this
> rendering I have radiosity too bright. My am is to match the output of
> MentalRay as close as possible. The cart still needs sides and something to
> be pulling it. And some cargo. Hay probably.

Slower, perhaps, but the textures are so much nicer. And though the lighting
isn't perfect, the softening and darkening on the inside of the wheels
makes it look much more like wood. The only thing I like better in the
first image is the road. Very nice.

-s
5TF!

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"stm31415" <sam### [at] cscom> wrote:
> "m1j" <mik### [at] hotmailcom> wrote:
> > I built this cart in XSI but decided to see what POVRay would do with it. I
> > had to change the road look because of differences in texturing systems and
> > the fact that part of my textures in XSI are not tillable. I had to fix
> > that for POVRay which I will use in XSI as well.
> >
> > I still need to do a lot of work on lighting. POVRay is clearly slower so it
> > is taking me more time to tweak the radiosity and light values. In this
> > rendering I have radiosity too bright. My am is to match the output of
> > MentalRay as close as possible. The cart still needs sides and something to
> > be pulling it. And some cargo. Hay probably.
>
> Slower, perhaps, but the textures are so much nicer. And though the lighting
> isn't perfect, the softening and darkening on the inside of the wheels
> makes it look much more like wood. The only thing I like better in the
> first image is the road. Very nice.
>
> -s
> 5TF!


The texture in the first one will end up being used in the bottom image. The
top is POVRay. The bottom in XSI. The bottom one rendered in about an hour.
The top took 8 hours. Longer as I increase radiosity quality. MentalRay has
the advantage of payed programmers working 8 hours a day to make it fast.
As well has it being scanline and raytrace. The amazing thing about POVRay
is that I will be able to make the same image as XSI if I have stick with
it.

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I prefer the POV-Ray version. That wood texture is damn nice. And I 
think the lighting really shows it off. (The floor isn't bad either!)

Very nice.

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Orchid XP v2 <voi### [at] devnull> wrote:
> I prefer the POV-Ray version. That wood texture is damn nice. And I
> think the lighting really shows it off. (The floor isn't bad either!)
>
> Very nice.

It is the same wood texture used in both. POVRay radiosity is just set too
high and makes the wood glow. What is missing in POVRay version I plan on
attempting to get is the occulsion affect. I will also use the POVRay
version to push the XSI version. They will feed off of each other.

Thanks.

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news:web.43ecf375bedcbdc7ed196ef10@news.povray.org...
> It is the same wood texture used in both. POVRay radiosity is just set too
> high and makes the wood glow.

Is ambient explicitely set to 0?

Marc

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m1j wrote:
> I built this cart in XSI but decided to see what POVRay would do with it. I
> had to change the road look because of differences in texturing systems and
> the fact that part of my textures in XSI are not tillable. I had to fix
> that for POVRay which I will use in XSI as well.
> 
> I still need to do a lot of work on lighting. POVRay is clearly slower so it
> is taking me more time to tweak the radiosity and light values. In this
> rendering I have radiosity too bright. My am is to match the output of
> MentalRay as close as possible. The cart still needs sides and something to
> be pulling it. And some cargo. Hay probably.
> 
> 
> ------------------------------------------------------------------------
> 
Interesting too see the systems side by side but the results can be 
nothing more than anectodal without more control I would think.

The interesting thing here is whether you are focused on the cart or the 
  setting.  In the XSI version the texures on the cart stand out better 
and the color seems more apropriate, but the sense of lighting on the 
ground looks utterly crude and synthetic when compared to the delicate 
light at play in the POV render.  But lighting and texturing, especially 
finish, work very, very closely with one another, at least in POV they 
do.  I assume that is probably also true in other programs but I don't 
know for sure.  But there would be little way to standardize the 
settings between the two programs, would there be?  Never-the-less an 
interesting study in so far, as you mentioned, that it establishes that 
POV-Ray, a free program, gives up little to a professional program.

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Jim Charter <jrc### [at] msncom> wrote:
> m1j wrote:
> > I built this cart in XSI but decided to see what POVRay would do with it. I
> > had to change the road look because of differences in texturing systems and
> > the fact that part of my textures in XSI are not tillable. I had to fix
> > that for POVRay which I will use in XSI as well.
> >
> > I still need to do a lot of work on lighting. POVRay is clearly slower so it
> > is taking me more time to tweak the radiosity and light values. In this
> > rendering I have radiosity too bright. My am is to match the output of
> > MentalRay as close as possible. The cart still needs sides and something to
> > be pulling it. And some cargo. Hay probably.
> >
> >
> > ------------------------------------------------------------------------
> >
> Interesting too see the systems side by side but the results can be
> nothing more than anectodal without more control I would think.
>
> The interesting thing here is whether you are focused on the cart or the
>   setting.  In the XSI version the texures on the cart stand out better
> and the color seems more apropriate, but the sense of lighting on the
> ground looks utterly crude and synthetic when compared to the delicate
> light at play in the POV render.  But lighting and texturing, especially
> finish, work very, very closely with one another, at least in POV they
> do.  I assume that is probably also true in other programs but I don't
> know for sure.  But there would be little way to standardize the
> settings between the two programs, would there be?  Never-the-less an
> interesting study in so far, as you mentioned, that it establishes that
> POV-Ray, a free program, gives up little to a professional program.

Part of the challenge is matching the two scenes with different systems of
setting things up. The focus for me is always how real does it look. I have
noticed povray is better at color transport in light. The next version of
XSI claims to have inproved this. The floor is heightfield in POVRay while
it is a displacement in XSI. I can push the detail up in XSI to reach that
of POVRay.

I fixed some of the texture problem of the floor when I was working in
POVRay. I will now move those fixes into XSI to begin making a better
comparison. My goal is to find an easy way to move back and forth. Once I
find setting that compare I will write the XSI script to output povray
scenes for rendering. That is if I complete this one project of many I have
going at the moment.

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> I still need to do a lot of work on lighting. POVRay is clearly slower so 
> it
> is taking me more time to tweak the radiosity and light values. In this
> rendering I have radiosity too bright. My am is to match the output of
> MentalRay as close as possible. The cart still needs sides and something 
> to
> be pulling it. And some cargo. Hay probably.

Fascinating study.
As you tweak it will you remodel the barrow? Those handles just seem 
gianormous to me - the scale of grain and cobbles suggests wheels about 1m 
diameter with huge logs for handles bigger than a handgrip by far.

Is that just me?

DLM

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"Orchid XP v2" <voi### [at] devnull> wrote

> I prefer the POV-Ray version. That wood texture is damn nice. And I
> think the lighting really shows it off. (The floor isn't bad either!)

My reaction is just the opposite. POV version looks flat and boring, XSI is
very 3D (just look at the wheels). Of course lighting isn't identical
either, but for 1/8the the time, XSI is giving an excellent result IMO.

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