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Subject: 
Re: On obscure color conversions.
Newsgroups: 
lugnet.cad.mlcad
Date: 
Tue, 24 Oct 2000 21:57:09 GMT
Viewed: 
1889 times
  
In lugnet.cad.mlcad, Steve Bliss writes:
In lugnet.cad.mlcad, James J. wrote:

In LDLite, a few colors were added to the existing LDraw/LEdit palette. Among
them were 21, the glow-in-the-color, 25, the reddish orange, and 2 versions • of
tan. While these continue to look good in LDLite and MLCAD, they show up as
pale imposters of 0-15 on LEdit. However, dithered -- and better looking --
combinations of colors made in LEdit/LDraw (between 256 and 511), which do • show
up in MLCAD, are given no names, diminishing their effectiveness in printed
instructions. Here is my solution to this growing problem. Official names
should be given to the LDraw dithers (and some MLCAD 24-bit colors) in order
to make them easier to use.

A number of the color-codes you listed *are* in the LDraw FAQ,
<http://www.ldraw.org/faq>, which is about as official as things get, for
colors in LDraw-world.
Thanks for mentioning the LDraw FAQ. At the bottom of my own LDraw page
<http://www.people.memphis.edu/~Jejackso/ledit.html>, I've clipped the chapters
involving colors and inserted a few of my own color alternatives which should
work on either LDraw, MLCad, or POV-Ray.
These codes are:

    #382 - Tan (same as TLG's Tan)
    #366 - Gold
Note: On POV-Ray, Color366 (Gold) is NOT metallic and must be made so by
copying and pasting texture values from Color383 (Silver).
    #383 - Silver
    #42 - Trans-Chartreuse
    #494 - [Electric] Contact
    #462 - Orange

And you made some suggestions for alternatives to the standard color
values:

    0x2FF8000 - Orange (same as 462, but closer to TLG's orange.)
    0x2705000 - (Try this in place of #6 for POV-Ray rendering.)
    #503 - Metallic (not really Silver)
Honestly, 503 is the twin to 383. But since everyone uses Color383 for silver,
Color503 can be changed in POV-Ray to any metallic color you choose, even that
copper-esque color on Rebel flight suits.
    #505 - Pastel Blue
    #441 - Sky Blue
    0x3FF6000 - 24-bit Trans-Orange (same as TLG's trans-orange.)
    0x21FCAFF - Autobot Blue (my 24-bit Sky Blue alternative)

(LDraw color #9 is a light blue, which can be used as the sky blue.)
441 is a Light Blue and Cyan dither, making for a much brighter color than #9.
It is very good for Computer screens and robot eyes.

    #510 - Pastel Yellow

(the LDraw FAQ lists 495 as Light Yellow.  Are there two different shades
of light/pastel yellow?)
As for Pastel Yellow, there are 2 choices for every dithered color. The
difference between the two can only be seen in LDraw, or a similar program (It
will look the same to POV-Ray).
In LDLite, you can use the 0 COLOR command to redefine the RGB values used
for color codes, so it's possible to substitute these values, but still use
the standard color-codes.

I don't know if MLCAD recognizes the 0 COLOR command or not.

Thanks for informing me of this command. I had no idea it could be done.
A couple of your suggestions, I'm not sure what LEGO colors they represent.
Help me out, what sets/themes are these from?

    #492 - Reddish Orange (or a transparent alternative for POV-Ray, ?)
    0x28098B0 - Stormy Gray
492 is the same as 462 with a light red base instead of yellow. Because there
are no transparent dithers, I use 492 to represent a transparent version of
462. (Of course, 44 could be used until you get a better program too.) In
POV-Ray, again you would be required to copy translucent texture values from
32-47 or 0x3000000-0x3FFFFFF. Stormy Gray is not an official TLG color, but can
be implemented for a departure from the 7 & 8 grays.

And some of your ideas are for LEGO colors that don't have LDraw codes in
the FAQ. You are right, they should be in there.

    #277 - (Cool) Violet (same as purple used for Grimace McDonald's LEGO
promo)
I love this color and sadly, only have it in 3 x 2 slope bricks. It is used
largely in my 'Marauders' LDraw space collection.
    #430 - "Spinach Green" or Chartreuse
Note: 430 is used to make the screen(s) on my 1 x 2 Nintendo System tile
<http://www.people.memphis.edu/~Jejackso/3069pGB.dat>. It looks good in places
that call for a solid Chartreuse, as opposed to #10.
    0x3500080 - Trans-Violet (as used in Belville's "Queen's Chamber"
offering.)
Another 'Marauders'-based want.
I just realized, the non-reflective black color used for Rubber Tires, #256,
should be named as well.

BTW, here are all the entries in the current LDraw FAQ that don't have
LDraw codes:

Glow in the dark    RGB: 224 255 176  LDLite: 21
Light purple        RGB: 224 204 240  LDLite: 20

I've seen it. "Lavender" is a better name.
Lime green (BT II)  RGB: 173 221 80   LDLite: 27

I've seen it. 10 or 430 look less... yucky.
Pastel green        RGB: 102 240 153  LDLite: 17
Purple              RGB: 153 51 153   LDLite: 22
Purple blue         RGB: 76 0 204     LDLite: 23
Transparent orange  RGB: 255 102 0    LDLite: 57  POV-Ray: <1,0.68,0,0.8>
My own choice for POV-Ray's Trans. Orange is <1,0.375,0,0.8>. Some number
between 0.375 and 0.5 for green [RGB] will still make it look very official.
After all, LEGO's trans.-orange is very reddish.

Steve

Thank you for offering your help, Steve.

James Jackson
<http://www.people.memphis.edu/~Jejackso/ledit.html>
"When will they make the Ninja torso in orange so I can have my own Gohan and
Krillin [DragonBall Z] minifigs?"



Message is in Reply To:
  Re: On obscure color conversions.
 
(...) A number of the color-codes you listed *are* in the LDraw FAQ, (URL), which is about as official as things get, for colors in LDraw-world. These codes are: (...) And you made some suggestions for alternatives to the standard color values: (...) (24 years ago, 24-Oct-00, to lugnet.cad.mlcad)

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