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From: Rick Measham
Subject: Re: glassware - 116Ko - bouchon.jpg (1/1)
Date: 20 Mar 2005 17:18:41
Message: <423df6c1@news.povray.org>
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Rarius wrote:
> I'd suggest rounding off the edges of the wide disk... You don't get sharp
> aedges like that on glassware.
Round_Cylinder in shapes.inc
> It would be nice to round off the edges of the part that goes into the
> bottleneck, but as its a cone that is a little more difficult.
Round_Cone in shapes.inc
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From: Rick Measham
Subject: Re: glassware - 116Ko - bouchon.jpg (1/1)
Date: 20 Mar 2005 17:22:49
Message: <423df7b9@news.povray.org>
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kurtz le pirate wrote:
> any comments ?
Looks good!
Things I especially like:
1. The sphere rounds out into the cylinder
2. Likewise with the cone
Is the wavy line a frosting as normally appears on these things to help
seal the bottle? If so, I'd like to see it moved up the cone and the
complete frosting follow it up so that most of the cone is frosted.
If it *is* frosting, it's very very cool.
I'd like to see a little rounding on the edges (as posted elsewhere,
Round_Cylinder and Round_Cone in shapes.inc)
Overall though, it really looks good!
Cheers!
Rick
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James D wrote:
> Looks good. But I don't know, the shadow looks strange.
It's the glass' IOR (incidence of refraction?) that stops light passing
directly through. As glass gets thicker it's more pronounced so that
although it appears clear (the thin-end of the cone), almost no light
passes directly through it, thus you get a dark shaddow. All the light
entering that end is bounced around inside and end up exiting further up
the cone at almost the same point as every other bit of light, thus you
have the ultra bright patches.
Sorry if this is a bit 101 ...
Cheers!
Rick
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"Rarius" wrote:
> It would be nice to round off the edges of the part that goes into
> the bottleneck, but as its a cone that is a little more difficult.
Check Round_Cone macro in shapes.inc
Alf
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Hi,
I love glass renders.
Very nice, although I agree with Rarius about the edges.
Alf
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Rick Measham nous apporta ses lumieres en ce 2005-03-20 17:25:
> James D wrote:
>
IOR (incidence of refraction?)
ior = index of refraction. It define by what amount the light get refracted (deviated,
bent) when
entering the material.
Alain
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From: Bob Hughes
Subject: Re: glassware - 116Ko - bouchon.jpg (1/1)
Date: 20 Mar 2005 22:35:08
Message: <423e40ec@news.povray.org>
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I always like to see things like this, reminding me of what a ray tracer is
all about. I think this has the look of some earlier ray traces from the
1990's. I tend to get lost in the many others now which are more complex or
analytic or artistic and forget they are ray traced.
You might want to add a slightly softened shadow using area_light, although
that might deter from the clean and sharp appearance. I didn't read if
anyone else replied to suggest that yet. There is softness to the caustics,
so maybe that's why it is so appealing to me, too.
Bob Hughes
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the 'rounded edges' versions...
thanks for your comments
Post a reply to this message
Attachments:
Download 'rbouchon.jpg' (78 KB)
Preview of image 'rbouchon.jpg'
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From: Alf Peake
Subject: Re: glassware - rounded ! (128K) - rbouchon.jpg (1/1)
Date: 21 Mar 2005 09:26:14
Message: <423ed986@news.povray.org>
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"kurtz le pirate" wrote:
> the 'rounded edges' versions...
I like it even better. The rounded edges do make a difference don't
they?
Alf
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