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2 Nov 2024 18:51:48 EDT (-0400)
  Lego rescue vehicles (Message 1 to 10 of 10)  
From: StephenS
Subject: Lego rescue vehicles
Date: 2 Apr 2010 08:50:01
Message: <web.4bb5e6d7a650ed1a1061154c0@news.povray.org>
These are the rescue vehicles depicted on the instruction booklet from Lego set
#386.

There are two more vehicles shown on the box, a small helicopter and small
plane. I may revisit the Lego world at some later time, for now i'm off to
explore other interests.

Comments welcome.

Stephen S


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Preview of image 'lego_blocks_a0009.png'
lego_blocks_a0009.png


 

From: clipka
Subject: Re: Lego rescue vehicles
Date: 2 Apr 2010 09:21:59
Message: <4bb5ef77$1@news.povray.org>
Am 02.04.2010 14:45, schrieb StephenS:
> These are the rescue vehicles depicted on the instruction booklet from Lego set
> #386.

Methinks the red and blue are a tad too strong; the grey is definitely 
too bright, and I think the white could be a slight bit darker, too. The 
yellow is a bit too greenish.

Nice job though.


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From: StephenS
Subject: Re: Lego rescue vehicles
Date: 2 Apr 2010 11:25:01
Message: <web.4bb60bb6377bb905ac1fa57c0@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Am 02.04.2010 14:45, schrieb StephenS:
> > These are the rescue vehicles depicted on the instruction booklet from Lego set
> > #386.
>
> Methinks the red and blue are a tad too strong; the grey is definitely
> too bright, and I think the white could be a slight bit darker, too. The
> yellow is a bit too greenish.
>
> Nice job though.

The blue is the only colour I really dislike, the rest are close enough to the
picture in my mind. ;-)

Stephen S


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From: TC
Subject: Re: Lego rescue vehicles
Date: 2 Apr 2010 12:23:24
Message: <4bb619fc$1@news.povray.org>
> Methinks the red and blue are a tad too strong; the grey is definitely too 
> bright, and I think the white could be a slight bit darker, too. The 
> yellow is a bit too greenish.

Assuming the yellow for the victim on the stretcher is the same used 
everywhere else, I think the yellow is quite OK. The stretcher is basqued in 
light. So maybe the greenish tint in the yellow I perceive elsewhere comes 
from shade and reflection?

The white and grey seem OK, too. Do you have gamma-problems?

After having calibrated my TFT and graphics card things look really strange 
when windwos starts for three seconds. Then the card's driver kicks in and 
starts to apply gamma-correction... and all is well again.

Gamma correction - a curse or a blessing?


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From: clipka
Subject: Re: Lego rescue vehicles
Date: 2 Apr 2010 13:25:00
Message: <4bb6286c$1@news.povray.org>
Am 02.04.2010 18:23, schrieb TC:
>> Methinks the red and blue are a tad too strong; the grey is definitely too
>> bright, and I think the white could be a slight bit darker, too. The
>> yellow is a bit too greenish.
>
> Assuming the yellow for the victim on the stretcher is the same used
> everywhere else, I think the yellow is quite OK. The stretcher is basqued in
> light. So maybe the greenish tint in the yellow I perceive elsewhere comes
> from shade and reflection?

I percieve the stretcher-user's face as too greenish, too.

> The white and grey seem OK, too. Do you have gamma-problems?

Not on my primary display.

The grey and white are hardly discernible except where occuring 
side-by-side, at all brightness levels; for instance, could you tell at 
a glance whether the substructure below the bench-thing is made from 
grey or white bricks? Or what color the hovercraft's propeller has?

I don't know what colors they used back then, but with today's colors 
you should be able to tell.


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From: TC
Subject: Gamma?
Date: 2 Apr 2010 16:44:14
Message: <4bb6571e@news.povray.org>
> I percieve the stretcher-user's face as too greenish, too.

I have done a bit of measuring. You are right, there is a bit of green 
in the victims face. I am posting a screencopy of the face to show you 
what line I used to sample the colorvalues (red rectangle, pixels from 
right to left):

I first did measure the original png-picture. 

<128, 128, 1>, <255, 255, 27>, <255, 255, 59> (9 pixels, same value)

Then I measured a screencopy of the png-file as displayed in Outlook 
express:

<117, 117, 1>, <255, 255, 20>, <255, 255, 49> (9 pixels, same value)

Conclusion: when >I< display the picture my gamma-correction seems to 
take out around 20% of the blue colour value. So I do perceive the 
yellow less green-ish than you do, probably.

I would be intesting to know what you measure.

Please do a really strong zoom on this picture to see what area I used - 
if you are interested in comparing the png-colour values to screencopy 
values on your computer at all.



I never thought about this, but obviously every time you do a screencopy 
and save the picture, gamma-correction alters the colours. Makes perfect 
sense when you think about it - but I have to say I never thought about 
this fact at all.


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From: clipka
Subject: Re: Gamma?
Date: 2 Apr 2010 18:03:31
Message: <4bb669b3$1@news.povray.org>
Am 02.04.2010 22:44, schrieb TC:

> I have done a bit of measuring. You are right, there is a bit of green
> in the victims face. I am posting a screencopy of the face to show you
> what line I used to sample the colorvalues (red rectangle, pixels from
> right to left):

> I first did measure the original png-picture.
> <128, 128, 1>, <255, 255, 27>, <255, 255, 59> (9 pixels, same value)

I have a <255,255,52> in the original picture as 3rd value before the 
multiple <255,255,59>.

> Then I measured a screencopy of the png-file as displayed in Outlook
> express:
>
> <117, 117, 1>, <255, 255, 20>, <255, 255, 49> (9 pixels, same value)

Thunderbird doesn't seem to tamper with the colors. Though the reason 
might be that I'm using sRGB as color profile in Windows, with the 
calibration being taken care of by the graphics card drivers.

> Conclusion: when >I< display the picture my gamma-correction seems to
> take out around 20% of the blue colour value. So I do perceive the
> yellow less green-ish than you do, probably.

No, you might just percieve it as less blue-ish. Which is a different thing.


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From: StephenS
Subject: Re: Lego rescue vehicles
Date: 3 Apr 2010 09:20:00
Message: <web.4bb73f7f377bb9055d6bc8730@news.povray.org>
"TC" <do-not-reply@i-do get-enough-spam-already-2498.com> wrote:
....
> Do you have gamma-problems?
....
Yes.
I have two computers, and the image looks different on each.
Note, there is a blue light in the scene to help fill in the shadows.

Stephen S


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From: Reuben Pearse
Subject: Re: Lego rescue vehicles
Date: 7 Apr 2010 17:12:44
Message: <4BBCF550.4050802@pearse.co.uk>
Great stuff. It seems like POV-Ray is the tool of choice for Lego 
rendering :-)

Do you have the MLCAD/LDR files for these models, or did you CSG them by 
hand?

I recently found the following link that maybe useful in achieving extra 
realism when rendering Lego. It's got some good POV includes for Lego 
textures:
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=163897

--
Reuben
reu### [at] pearsecouk

For 3D Lego models visit http://www.pearse.co.uk/lego


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From: StephenS
Subject: Re: Lego rescue vehicles
Date: 3 Jul 2010 21:40:01
Message: <web.4c2fe552377bb9054f0cc49a0@news.povray.org>
Reuben Pearse <reu### [at] pearsecouk> wrote:
> Great stuff. It seems like POV-Ray is the tool of choice for Lego
> rendering :-)
>
> Do you have the MLCAD/LDR files for these models, or did you CSG them by
> hand?
> ...
Thank you, I CSG'ed them in a modeler , Bishop3d, and then copy/paste them
around the scene in an OpenGL view.

Stephen S


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