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Date: Tue, 19 Sep 1995 21:18:08 -0400 (EDT)
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Subject: Re: Surface Question?
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>>Gary Coulter <[e-mail]> said:
>>>        To look at it another way if I have a starship that is surfaced
>>>        with hullplate, is there no way (other than creating it from curves
>>>        and stenciling it) to add a logo/insignia.
>>
>[e-mail]
>>     You can always create geometry that hovers over the hull by one
>>     nanometer.
>
Joe Angell <[e-mail]> said:
>...Or use the Attach/Detach functions to make a co-planar detail polygon
>(uh... right). (same idea, only easier to line-up)

You basically _must_ "Attach" the detail polys even when theyre not
co-planar if youre going to have your them that close (one nanometer) to
the hull.  Otherwise youll end up with wacky Z-buffer rendering errors
like alternating polys visible on alternate scan lines.

Also, in a separate message, [e-mail] (Steve) said:
>Have you tried using Modeler/Drill/Stencil to assign a different surface
>area on the bottle object for the lable image?  Ax

Interesting...  "Stencil" is definitely the way to go if your bottle is round.

I would use the "attach" technique if your bottle had flat surfaces, but
others might disagree.  "Attach" has been around since Lightwave was
"VideoScape," yet lately people seem to be suggesting "Stencil" as a means
to get this "detail" effect.  Is there some aesthetic reason for this (Does
it look better?)  Does it render faster?

When I see something like the clapboard example from LWPro 3.7, I think to
myself "Theres something I would have done using Attach."  Doesnt
stenciling the text leave you with many weird shaped polys? (whose edges
conform to the newly cut in text vs. 1 simple rectangle.)  Doesnt
stenciling the text into the surface make it a lot more difficult to come
back and change the text later?  Doesnt stencil take much more time and
stack (at modeling time) than "attach."   (Especially if youre stenciling
in complicated polys like text?)

While I appreciate the article as a tutorial on how to use the stencil
feature (and I certainly appreciate LWPro!) I just wonder how stencil got
to be the preferred way to do this?  Am I missing something?

Finally, I believe what the original poster is asking for is something that
doesn't yet exist in Lightwave, but which is sorely needed.  Namely, the
ability to arbitrarily place a little bitmap anywhere on an object
(regardless of surfaces, polygon seams, etc.) and have it stick.  This
would be a fantastic feature, and with Lightwave's prowess in other areas
I'm sure we'll see it eventually.  From a user-interface standpoint I guess
the easiest way to do this would be to allow attached polys to "conform" to
the polys theyre attached to.  That does away with the major limitation of
"attachments" which is that they are difficult to attach (in any way that
renders pleasingly) to a non-planar surface.

I guess for now one of those cool new "3D" paint packages that are showing
up on other platforms (which let you paint interactively on your 3D model,
when youre done you have a perfect image map) would be the best way to do
this.  Unfortunately Ive never seen anyone using one of those paint
programs so Im not even sure they really exist ;-)

 - Chris Ludwig

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