"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> "stevenvh" <nomail@nomail> wrote:
> > Warp <war### [at] tagpovrayorg> wrote:
> > > stevenvh <nomail@nomail> wrote:
> > > > I made a set of partial images using Start_Column, End_Column, Start_Row and
> > > > End_Row.
> > > > Now I want to combine them, but Photoshop can't read the images. Are the files
> > > > not standard bitmap files (PNG in my case)?
> > > > Any tools around to do this?
> > >
> > >   Try with the Gimp. IIRC, it ignores the errors and reads the images.
> > > You can then re-save them.

GIMP seems to have a problem with the images after all. My complete image is
square and I made 4 partial square images, one for each quadrant.

1. The top-left opens all right, and after saving it again I can open it in
Photoshop.

2. The top-right, however, opens, but the image seems to be offset: the left
half is empty (shows checkerboard pattern), and the right half is black, which
makes sense since these are probably the top-left and bottom-left quadrants,
which weren't rendered anyway. How do I get rid of the offset?

3. Bottom-left opens and saves alright, though afterward it seems to have moved
to the top-left position.

4. Bottom-right only shows a black square in the bottom-right quadrant, no
rendering.

Since neither GIMP and Photoshop (and possibly other image editors as well) can
open the partial images properly, I think POV-Ray should change the way partial
images are saved, i.e. not truncated.
This should not be too hard, and the change is limited to saving. (It doesn't
involve the render engine, for instance.)

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