Hello everybody!
I'm very new to 3D graphics, and I don't really want to learn using 3D 
programs. I only want to change a small detail in a 3D model.

The 3D model is a LightWave model of AIBO roboter, which consists of a 
scene file (aibo3d.lws) and 36 object files (*.lwo).
The problem is, some of the objects get rendered half-transparent, so 
you can look inside them. I dont want them to be transparent, so I 
opened LightWave 3D, Version 8.0. 500000000 buttons, settings and 
strange behaviours I don't understand. I even don't know if I should 
search the transparency setting in the scene or in the object settings.

Can somebody explain simple what I have to do? I have compressed the 
files and uploaded them to my website, perhaps somebody wants to view 
the 3D model:

www.planet-albert.de/ERS7.zip

You'll see that the right objects (RforefootB, RforefootC, ...) and the 
body are transparent, while the left objects (LforefootB, LforefootC, 
....) are ok.

I want to read the model with Java3D, which has problems with some file 
formats. So it would help me, if you tell me, how I can change the 
transparency by myself, so that I can test the output at once.

Please help me! I don't know what to do!

Thanks in advance,
Daniel

"Daniel H�h" <dhoeh@gmx.de> wrote in message 
news:43bc2aa0$1_2@news.arcor-ip.de...
> Hello everybody!
> I'm very new to 3D graphics, and I don't really want to learn using 3D 
> programs. I only want to change a small detail in a 3D model.
>
> The 3D model is a LightWave model of AIBO roboter, which consists of a 
> scene file (aibo3d.lws) and 36 object files (*.lwo).
> The problem is, some of the objects get rendered half-transparent, so you 
> can look inside them. I dont want them to be transparent, so I opened 
> LightWave 3D, Version 8.0. 500000000 buttons, settings and strange 
> behaviours I don't understand. I even don't know if I should search the 
> transparency setting in the scene or in the object settings.
>
> Can somebody explain simple what I have to do? I have compressed the files 
> and uploaded them to my website, perhaps somebody wants to view the 3D 
> model:

So you bought lightwave, but don't want to learn it? Why did you buy it 
then?

-- 
Gareee�
(Gary Tabar Jr.)

Hi Daniel...

I took a lookat the scene and objects.   Hehehehe,
You made a funny boo-boo.  The objects actually
aren't transparent.  It's just that the background
color and the geometry color of that side are the
same.  So in OpenGL one might think they are
transparent.   

Try this: 

1. Load the scene.
2. Press {F9}

:D

First, thank you for your help.

> I took a lookat the scene and objects.   Hehehehe,
> You made a funny boo-boo.  The objects actually
> aren't transparent.  It's just that the background
> color and the geometry color of that side are the
> same.  So in OpenGL one might think they are
> transparent.
Ok, so, you know, I'm an absolute newbie in editing 3D data.
When I look at the scene which the LightWave main program (not Modeler!) 
shows, I see the left legs in white, while the right legs seem to be 
transparent. Also when I let Java3D render the scene, I can look inside 
the right leg objects so I see the backside of the outer surface.
BUT:
I cannot find any dialog in LightWave which shows different settings for 
the left and right legs. I don't know for which setting I have to 
search. Can you tell me this?

> Try this: 
> 
> 1. Load the scene.
> 2. Press {F9}
This renders the whole model in the correct color!? But why is it 
displayed with the wrong colors in the LightWave working window, and 
also in Java3D?

Also Daniel,

erstmal weiss ich nicht woher Du das Objekt hast, aber es gibt
ein paar Teile die Transparenzen haben, ausserdem ist f�r
alle Surfaces double sided eingeschaltet. Das Objekt, welches
aus �ber 30 Sub-Objekten besteht, hat einige Eigenschaften,
die verhindern, bzw erschweren, da� es richtig in OpenGL oder
in Java3D angezeigt werden.

Da musst Du dich wohl durchbeissen, und das Objekt so
ver�ndern, da� es f�r dein Java Experiment funktioniert.
Du kannst ja im Zweifel den Ersteller des Objekts fragen ob er
dir das "reparieren" kann. Stichworte wie gesagt:
- double sided muss ausgeschaltet sein,
- alle polygone m�ssen nach "aussen" zeigen,
- und dieTransparenzen m�ssen aus den Surface Eigenschaften
entfernt werden, wenn deine Java3D geschichte das nicht versteht.


For those who follow this thread but don't understand the german
language... I just explained to Daniel that the object have some
attributes, like double sided, which might confuse the java 3D stuff
and if you uncheck double sided on all objects some of the polygones
are flipped. Some surfaces are transparent (36%) and maybe this also
don't work as expected in Java3D.

greetz dasRa


"Daniel H�h" <dhoeh@gmx.de> a �crit dans le message de news: 
43beaca5$1_1@news.arcor-ip.de...
> First, thank you for your help.
>
>> I took a lookat the scene and objects.   Hehehehe,
>> You made a funny boo-boo.  The objects actually
>> aren't transparent.  It's just that the background
>> color and the geometry color of that side are the
>> same.  So in OpenGL one might think they are
>> transparent.
> Ok, so, you know, I'm an absolute newbie in editing 3D data.
> When I look at the scene which the LightWave main program (not Modeler!) 
> shows, I see the left legs in white, while the right legs seem to be 
> transparent. Also when I let Java3D render the scene, I can look inside 
> the right leg objects so I see the backside of the outer surface.
> BUT:
> I cannot find any dialog in LightWave which shows different settings for 
> the left and right legs. I don't know for which setting I have to search. 
> Can you tell me this?
>
>> Try this: 1. Load the scene.
>> 2. Press {F9}
> This renders the whole model in the correct color!? But why is it 
> displayed with the wrong colors in the LightWave working window, and also 
> in Java3D? 

Hi dasRa!
Much thanks for your help! This is what I wanted. I think I'll have to 
get in deeper than I expected, but your catchwords will help me much.

Regards,
Daniel

> - alle polygone m�ssen nach "aussen" zeigen,
This was the problem with my objects. The polygon normals of some of the 
objects at the right side pointed to the inner side of the object.

That is very strange.  Even tho I see now some pieces were
flipped I think they shouldn't display in a different color. They
were set to double-sided after all.  Oh well, NewTek has messed
about with the OpenGL recently for speed-ups and stuff so maybe
that's the reason for it.

Tesselator schrieb:
> That is very strange.  Even tho I see now some pieces were
> flipped I think they shouldn't display in a different color. They
> were set to double-sided after all.  Oh well, NewTek has messed
> about with the OpenGL recently for speed-ups and stuff so maybe
> that's the reason for it.
> 

I'm using Java3D and I think, it cannot handle double-sided polygons. 
Thats why I see the back of the inner side of the polygons on these 
objects which have the flipped polygons.
I turned them into the right direction, and now everything looks fine.

Daniel