 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
How do I make the background transparent? Or prepare to do so in another
program? Also How is the alpha channel used?</html>
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
I also read the docs. If I want to do something; I go to the docs first.
Follow instructions. Experiment! Maybe a lot! Maybe not! It depends on
how successful I was and how clear the docs are. A lot of it is quite clear!
Some of it is not!
<br>An example is this current problem. How to make a transparent background.
<p>According to the docs; I should be able to use the following:
<br>"background {color transmit 1.0}"
<br>Turn on alpha channel with "+UA"
<br>This has left me with a gray background and I cannot seem to get it
totally transparent. The ambiguity is that in the docs it states that the
alpha data ranges from 0 to 255 with 0 being transparent and 255 being
opaque; but it does not say as to where these values can be set.
<br>My question is; Am I doing it properly or not. Am I missing something.
Where is the information located so that I may be successful in this endeavor?
<p>James Wood wrote:
<blockquote TYPE=CITE>How do I make the background transparent? Or prepare
to do so in another program? Also How is the alpha channel used?</blockquote>
</html>
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Using the Alpha Channel
<p>Another way to specify non-filtered transmit transparency in an image
map is by using the alpha channel. PNG file format allows you to store
a different transparency for each color index in the PNG file, if desired.
If your paint programs support this feature of PNG you can do the transparency
editing within your paint program rather than specifying transmit values
for each color in the POV file. Since PNG and TGA image formats can also
store full alpha channel (transparency) information you can generate image
maps that have transparency which isn't dependent on the color of a pixel
but rather its location in the image.
<p>Although POV uses transmit 0.0 to specify no transparency and 1.0 to
specify full transparency, the alpha data ranges from 0 to 255 in the opposite
direction. Alpha data 0 means the same as transmit 1.0 and alpha data 255
produces transmit 0.0.
<p>This is all the infomation I could find about using the alpha channel.
I may be dense; but I cannot for the life of me; determine exactly how
to use this feature from the above information. Any additional help would
be greatly appreciated
<p>James Wood wrote:
<blockquote TYPE=CITE>I also read the docs. If I want to do something;
I go to the docs first. Follow instructions. Experiment! Maybe a lot! Maybe
not! It depends on how successful I was and how clear the docs are. A lot
of it is quite clear! Some of it is not!
<br>An example is this current problem. How to make a transparent background.
<p>According to the docs; I should be able to use the following:
<br>"background {color transmit 1.0}"
<br>Turn on alpha channel with "+UA"
<br>This has left me with a gray background and I cannot seem to get it
totally transparent. The ambiguity is that in the docs it states that the
alpha data ranges from 0 to 255 with 0 being transparent and 255 being
opaque; but it does not say as to where these values can be set.
<br>My question is; Am I doing it properly or not. Am I missing something.
Where is the information located so that I may be successful in this endeavor?
<p>James Wood wrote:
<blockquote TYPE=CITE>How do I make the background transparent? Or prepare
to do so in another program? Also How is the alpha channel used?</blockquote>
</blockquote>
</html>
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
James Wood wrote:
>
> Using the Alpha Channel
Do a search through the .genreal group. There have been several discussions
on this topic and you will find more info there than I could personaly provide
for you. I think the most recent thread on this subject was sometime around the
end of last month.
--
Ken Tyler
mailto://tylereng@pacbell.net
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Ok! Now that I have done more reading and experimenting; I have come up
with a solution to my problem. I have found that I am able to get rid of
the background altogether ( which is actually what I was wanting to do
all along). What I did was to set background {color transmit 1.0}. Turn
on alpha channel by using "+Ua". Render the image. Use Paint Pro to load
the image. Under Selection Menu choose "Load from Alpha Channel". This
selects the image only. Then under Edit choose "Crop to Selection" This
will get rid of the background completely and reduce the file to the selected
image. KEEEEWL.
<p>Ken wrote:
<blockquote TYPE=CITE>James Wood wrote:
<br>>
<br>> Using the Alpha Channel
<p> Do a search through the .genreal group. There have been several
discussions
<br>on this topic and you will find more info there than I could personaly
provide
<br>for you. I think the most recent thread on this subject was sometime
around the
<br>end of last month.
<p>--
<br>Ken Tyler
<p><a
href="mailto://tylereng@pacbell.net">mailto://tylereng@pacbell.net</a></blockquote>
</html>
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Wed, 07 Jul 1999 13:29:39 -0700, James Wood wrote:
><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
><html>
...
></html>
Could you please fix your news reader or web browser or whatever
Netscape is to not post as HTML? Usenet isn't a web site. Thanks.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On 7 Jul 1999 16:24:36 -0400, par### [at] fwi com (Ron Parker) wrote:
>Could you please fix your news reader or web browser or whatever
>Netscape is to not post as HTML? Usenet isn't a web site. Thanks.
Hi, Ron. Oh, is that what that was? Using Agent, I could only see a file
attachment notation but no readable text at all.
--
Alan
--------------------------------------------------------------------
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
news.povray.org - where POV-Ray enthusiasts around the world can get
together to exchange ideas, information, and experiences with others
--------------------------------------------------------------------
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Seems to me I recall it said that 'sky_sphere' doesn't work with the
Alpha Channel, and I didn't think 'background' would at all. Hmmm....
I know that if you use a 'fisheye' camera that the unused portion of the
image rendered will be seen as transparent with apparently no control
over it I believe, but I could be wrong.
Glad you are getting it figured out anyway, unlike me.
James Wood wrote:
>
> Ok! Now that I have done more reading and experimenting; I have come
> up with a solution to my problem. I have found that I am able to get
> rid of the background altogether ( which is actually what I was
> wanting to do all along). What I did was to set background {color
> transmit 1.0}. Turn on alpha channel by using "+Ua". Render the image.
> Use Paint Pro to load the image. Under Selection Menu choose "Load
> from Alpha Channel". This selects the image only. Then under Edit
> choose "Crop to Selection" This will get rid of the background
> completely and reduce the file to the selected image. KEEEEWL.
>
> Ken wrote:
>
> > James Wood wrote:
> > >
> > > Using the Alpha Channel
> >
> > Do a search through the .genreal group. There have been several
> > discussions
> > on this topic and you will find more info there than I could
> > personaly provide
> > for you. I think the most recent thread on this subject was sometime
> > around the
> > end of last month.
> >
> > --
> > Ken Tyler
> >
> > mailto://tylereng@pacbell.net
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/homepage.htm
mailto://inversez@aol.com?Subject=PoV-News
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Alan,
Go to 'Options'->General Preferences. Under the 'MIME Types' tag
locate the 'HTML Document' type and make sure the 'Display when
inline' and 'Display when attached' boxes are checked.
Peter Popov
ICQ: 15002700
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
On Thu, 08 Jul 1999 18:05:42 GMT, pet### [at] usanet (Peter Popov) wrote:
>Go to 'Options'->General Preferences. Under the 'MIME Types' tag
>locate the 'HTML Document' type and make sure the 'Display when
>inline' and 'Display when attached' boxes are checked.
Thanks, Peter. That did the trick and I can see his message now.
--
Alan
--------------------------------------------------------------------
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
news.povray.org - where POV-Ray enthusiasts around the world can get
together to exchange ideas, information, and experiences with others
--------------------------------------------------------------------
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
