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I tried mapping an image to a sphere and then using
filter all .9 to make it transparent. It didn't make it transparent.
If I go highter than .9, it crashes POV consistently.
How can I get the effect I want?
(this ties into my other question about projecting light through layered
textures onto
a screen)
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random guess: try transmit and making the sphere hollow? i'm not sure
hollow does anything. by filter all, what do you mean? are you using
an image with a palatte? you need to. then you make each palatte entry
transparent on its own.
CreeD wrote:
>
> I tried mapping an image to a sphere and then using
> filter all .9 to make it transparent. It didn't make it transparent.
> If I go highter than .9, it crashes POV consistently.
> How can I get the effect I want?
> (this ties into my other question about projecting light through layered
> textures onto
> a screen)
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From: Chris Colefax
Subject: Re: image map crash - how to fix/avoid?
Date: 12 Jul 2000 20:20:54
Message: <396d0b66@news.povray.org>
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CreeD <mes### [at] nqi net> wrote:
> I tried mapping an image to a sphere and then using
> filter all .9 to make it transparent. It didn't make it transparent.
> If I go highter than .9, it crashes POV consistently.
> How can I get the effect I want?
> (this ties into my other question about projecting light through layered
> textures onto a screen)
If your image file is in a format that supports an alpha channel (TGA or
PNG), you cannot use filter and transmit. Instead, you either need to edit
the file to add a suitable alpha channel, or average the image map with a
transparent pigment.
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In article <396D097F.DDD7B660@yahoo.com>, ryan constantine
<rco### [at] yahoocom> wrote:
> random guess: try transmit and making the sphere hollow? i'm not sure
> hollow does anything.
The "hollow" keyword *only* affects media and fog. It's only purpose is
to specify that the object is "empty" and can be filled with media or
fog.
--
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/
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> I tried mapping an image to a sphere and then using
> filter all .9 to make it transparent. It didn't make it transparent.
> If I go highter than .9, it crashes POV consistently.
> How can I get the effect I want?
> (this ties into my other question about projecting light through layered
> textures onto
> a screen)
So transmit isn't helping, and it's still crashing. I guess I'll wait
until the next version?
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"CreeD" <meshe@nqi.net> wrote in message news:01bfecdf$2dc65ce0$1a1ba1d0@mk...
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| So transmit isn't helping, and it's still crashing. I guess I'll wait until the
next version?
That seems an odd problem. I don't recall ever encountering that. I know if "filter
all, 1" is
used it will error because of the comma which is okay if both things are a float like
'filter
255,1'.
Sounds more like a problem with the image file format to me; you didn't say what type,
color depth
and such, it is btw.
Bob
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