> So what clued you on to this, Tim?  I didn't see any complaints in the pov
> output (but perhaps I missed it).

The file path provided raised an error, so I saw that
code, and remembered that you can't use concat to
form a filename in-place, it expects a literal or an
identifier, it just seemed simpler to move it.
Luck and experience I guess.

> Does this warrant a bug report?

Maybe, POV scenes should render the
same under any OS. Here's a minimal scene that
renders fine in Windows, does it work in Linux?

#version 3.6;

camera {
   location  <0.0, 0.5, -4.0>
   direction 1.5*z
   right     x*image_width/image_height
   look_at   <0.0, 0.0,  0.0>
}

light_source {
   <-30, 5, -30>
   color <1, 1, 1>
}

#declare VAR = 1;
#declare PATH = "plasma3.png";

height_field {
  #ifdef (VAR)
     png
  #else
     png
  #end
  PATH
  pigment {rgb <0,1,0>}
  translate <-0.5,0,-0.5>
  rotate <90,0,0>
  scale <2,2,1>
}

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> This should render the final image.
> Eventually.
> It's really, really slow.

	When I tried rendering this image after POVCOMP had the scripts
released, I noticed this very slow render speed had to do with the poor
bounding of some objects from the boat -- don't remember which exactly.
One possible, simple workaround has been to add an extra object around
the boat (e.g. a sphere) that's used only for bounding.  Then the rest
of the scene renders *much* faster.  I'll try to recover the modified
scene and will post it here.  But ideally it would be far better to
fix the bounding of those individual objects to also speed the boat
rendering.

	- NC

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Tim Attwood wrote:

> Maybe, POV scenes should render the
> same under any OS. Here's a minimal scene that
> renders fine in Windows, does it work in Linux?
> 
It renders fine on this:
Persistence of Vision(tm) Ray Tracer Version 3.6.1 (x86_64-pc-linux-gnu-g++
  4.2.4 @ x86_64-pc-linux-gnu)
This is an unofficial version compiled by:
  portage (on nbisgentoo64)

find it at:
http://ohnopublishing.net/~ohnobinki/images/sameonwindows.3.6.png

and on this:
Persistence of Vision(tm) Ray Tracer Version 3.7.0.beta.25b (g++ 4.1.2 @
  x86_64-unknown-linux-gnu)
This is an unofficial beta-test version compiled by:
  Nathan Phillip Brink <ohn### [at] ohnopublishinghomelinuxnet>

find the result at:
http://ohnopublishing.net/~ohnobinki/images/sameonwindows.3.7.png

I'm not sure where I set that alpha is default for 3.6, but that's what 
it looks like (I'm guesing).

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