How do I render a subsection of an image so that the resulting image is of
the size of that subsection (not the size of the full image)?

I'm aware of Start_Row, Start_Column, End_Row and End_Column, however the
resulting image size (from using just these options) is that of the full
image instead of just the subsection.

Ouroborus

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Ouroborus wrote:
> 
> How do I render a subsection of an image so that the resulting image is of
> the size of that subsection (not the size of the full image)?
> 
> I'm aware of Start_Row, Start_Column, End_Row and End_Column, however the
> resulting image size (from using just these options) is that of the full
> image instead of just the subsection.
> 
> Ouroborus

In the windows version of the program is a rubberband feature.
Start a render. When the render window appears stop the render
by pressing alt g. Use your mouse to define the area you wish
to render. A dialog will popup after you define the area asking
if you want to render that area now. Choose yes. It will only
render the selected area you choose.

-- 
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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Ken wrote:
> 
> In the windows version of the program is a rubberband feature.
> Start a render. When the render window appears stop the render
> by pressing alt g. Use your mouse to define the area you wish
> to render. A dialog will popup after you define the area asking
> if you want to render that area now. Choose yes. It will only
> render the selected area you choose.
> 

I think that does exactly the same as Start_Row etc. do.  To render an area in
full width and height you either have to change the camera or calculate the
larger full size necessary to get the subsection in the size wanted. 

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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"Ken" <tyl### [at] pacbellnet> wrote in message
news:3A0900AB.291809CE@pacbell.net...
>
> Ouroborus wrote:
> >
> > I'm aware of Start_Row, Start_Column, End_Row and End_Column, however the
> > resulting image size (from using just these options) is that of the full
> > image instead of just the subsection.
>
> Use your mouse to define the area you wish
> to render. A dialog will popup after you define the area asking
> if you want to render that area now. Choose yes. It will only
> render the selected area you choose.

Going out on a short limb here, I think Ouroborus doesn't want the entire
window size for the specified render resolution to show but to only have a
render window the size of the selected region instead.  Must need work space
while viewing I guess.
Can't be done.  Although the window size and view position can be manipulated
in the usual way.  I'm also talking about the Windows OS here.
In fact, you may have come across a good feature idea Ouroborus.  Either to
have a Window menu like some other programs do (set Window size and/or position
then remember it) or a region-only window.

Bob

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"Bob H."
<per### [at] aolcom?subject=PoV-News:%20&body=Relating%20to%20POV-Ray:>
wrote in message news:3a0923f4@news.povray.org...
> "Ken" <tyl### [at] pacbellnet> wrote in message
> news:3A0900AB.291809CE@pacbell.net...
> >
> > Ouroborus wrote:
> > >
> > > I'm aware of Start_Row, Start_Column, End_Row and End_Column, however
the
> > > resulting image size (from using just these options) is that of the
full
> > > image instead of just the subsection.
> >
> > Use your mouse to define the area you wish
> > to render. A dialog will popup after you define the area asking
> > if you want to render that area now. Choose yes. It will only
> > render the selected area you choose.
>
> Going out on a short limb here, I think Ouroborus doesn't want the entire
> window size for the specified render resolution to show but to only have a
> render window the size of the selected region instead.  Must need work
space
> while viewing I guess.
> Can't be done.  Although the window size and view position can be
manipulated
> in the usual way.  I'm also talking about the Windows OS here.
> In fact, you may have come across a good feature idea Ouroborus.  Either
to
> have a Window menu like some other programs do (set Window size and/or
position
> then remember it) or a region-only window.

Yes, you explain much better what I was trying to accomplish.

The reason is different though. The image I'm rendering is 8868x22131 and as
a uncompressed BMP comes to over 600 meg. It turns out that a lot of
graphics editors can even load an image of this size. (I did find one that
can view it called 'ER Viewer' at www.ermapper.com).

My goal is to either render it in pieces or slice up a complete rendering.
So, alternatively, can anyone suggest some graphics slicing software that
can handle huge files?

My thanks,
Ouroborus

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Ouroborus wrote:
> 
> Yes, you explain much better what I was trying to accomplish.
> 
> The reason is different though. The image I'm rendering is 8868x22131 and as
> a uncompressed BMP comes to over 600 meg. It turns out that a lot of
> graphics editors can even load an image of this size. (I did find one that
> can view it called 'ER Viewer' at www.ermapper.com).
> 
> My goal is to either render it in pieces or slice up a complete rendering.
> So, alternatively, can anyone suggest some graphics slicing software that
> can handle huge files?
> 

If you can cope with horizontal stripes, just use +SR and +ER to render those
stripes.  I don't know what you want to do with the file, so it's not easy to
suggest a solution.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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Ouroborus wrote in message <3a099ad2$1@news.povray.org>...
>The reason is different though. The image I'm rendering is 8868x22131 and
as
>a uncompressed BMP comes to over 600 meg. It turns out that a lot of
>graphics editors can even load an image of this size. (I did find one that
>can view it called 'ER Viewer' at www.ermapper.com).
>
>My goal is to either render it in pieces or slice up a complete rendering.
>So, alternatively, can anyone suggest some graphics slicing software that
>can handle huge files?


If you output it as a series of uncompressed TARGA images (+FT), it is easy
enough to write a program to put the pieces together.

--
Mark

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"Ouroborus" <our### [at] hotmailcom> wrote in message
news:3a099ad2$1@news.povray.org...
>
> graphics editors can even load an image of this size. (I did find one that
> can view it called 'ER Viewer' at www.ermapper.com).
>

Well, if you can view it, PSP (and many other progs) would allow you to
capture an area.

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