POV-Ray : Newsgroups : povray.newusers : Help needed with Hamapatch Server Time
5 Nov 2024 03:16:25 EST (-0500)
  Help needed with Hamapatch (Message 1 to 1 of 1)  
From: Jet Jaguar
Subject: Help needed with Hamapatch
Date: 9 Mar 2002 16:11:40
Message: <02uk8ucchkcg8c30vakffbf0uq889s5vh7@4ax.com>
Sorry if this is in the wrong forum, I'm not sure where it fits best.
I also posted this question in binaries.images, but I'm posting it
here too (without the picture) in case someone can help me, but
doesn't normally read the binaries groups.

I'm just starting using Hamapatch, and I need some help.  I'm trying
to make a motorcycle-style helmet, and in the area around the face
opening I'm getting what I call "pinching".  The control points seem
to be smooth in Hamapatch, but in the previews and tests I've done, it
appears the surface is pinched together, or there are creases where
the CP's appear smooth.

I've done some research to figure out how to fix this, but everything
I've read says this is just an artifact of the OpenGL preview and it
won't render that way.  But this is clearly not the case because I
still see the pinching in the test renders I've done with POV-Ray.
Any advice how to go about fixing this, or perhaps something I can
tweak in Moray?  I've already noticed I can reduce the effect by
increasing the U and V steps and setting flatness to 0, but this
doesn't eliminate the problem completely.

In the picture I posted to binaries.images, the left image is a
snapshot of the helmet in Hamapatch, with the trouble areas indicated
by orange arrows.  The picture on the right shows a test render.  The
helmet was exported to Moray using the sPatch Moray export plugin, a
white plastic-like material was applied, then rendered with POV-Ray
3.1g.  It is not caused by the export process because I still get the
pinching when I render directly from Hamapatch.

Thanks in advance for your help.

---
Bob Chmilnitzky (a.k.a. Jet Jaguar)
I have a spam blocking address.  Replying to me is like pulling teeth.
Visit my crappy home page at http://home.att.net/~chmilnir/
MSTie #54297

Crossposting makes Baby Jesus cry.


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