Well, it's very simple.

When I try to trace a scene with no objects at all, POV-Ray runs
through all algorithms and stuff, but just as it tries to open the
render window, it crashes.

I'm using POV-Ray Beta 8, have Windows 98 with 800 MHZ and 340 MB Ram.

Is there no way POV-Ray could simply check if there is anything in
scene, and if there isn't, just traces black background?

By the way, sky_sphere doesn't count as object, strangely.

Here's an example:

camera{location <0,0,-5> look_at <0,0,0>}
light_source{<10,10,-10> rgb 1}
sky_sphere{pigment{gradient y color_map{[0 rgb 1][1 rgb 0]}scale 2
translate -1}}

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Interesting, because checking on that here I get a image rendered, albeit
blank one, when camera, camera + light, camera + light + sky_sphere, or
nothing at all is in the script (except commented out stuff).
Only differences between you're system and mine is Windows version and
amount of memory... unless that 800MHz is a AMD processor.
You should also see a Warning: no objects in scene message.
--
text{ttf"arial","bob h",.1,0pigment{rgb 9}translate<-1,-.2,3>}

"Tim Nikias" <Tim### [at] gmxde> wrote in message
news:3C19B9EA.D2E16FBC@gmx.de...
>
> When I try to trace a scene with no objects at all, POV-Ray runs
> through all algorithms and stuff, but just as it tries to open the
> render window, it crashes.
>
> I'm using POV-Ray Beta 8, have Windows 98 with 800 MHZ and 340 MB Ram.
>
> Is there no way POV-Ray could simply check if there is anything in
> scene, and if there isn't, just traces black background?
>
> By the way, sky_sphere doesn't count as object, strangely.
>
>
> camera{location <0,0,-5> look_at <0,0,0>}
> light_source{<10,10,-10> rgb 1}
> sky_sphere{pigment{gradient y color_map{[0 rgb 1][1 rgb 0]}scale 2
> translate -1}}

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bob h schrieb in Nachricht <3c19bd5d@news.povray.org>...
>Interesting, because checking on that here I get a image rendered, albeit
>blank one, when camera, camera + light, camera + light + sky_sphere, or
>nothing at all is in the script (except commented out stuff).


Strange, I get the expected result - a gradient y from dark grey to light
grey

Marc-Hendrik

PII 450, 128 MB, Win 98, Pov 3.5 beta 8.icl

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On Fri, 14 Dec 2001 09:35:54 +0100, Tim Nikias <Tim### [at] gmxde> wrote:

> When I try to trace a scene with no objects at all, POV-Ray runs
> through all algorithms and stuff, but just as it tries to open the
> render window, it crashes.

Works fine for me on NT 4 sp 6 PII 233 with 128 MB, but ...

> I'm using POV-Ray Beta 8, have Windows 98 with 800 MHZ and 340 MB Ram.

I observed crashes on any scene on Windows 95. I'll report is as separate report
after investigations. I remember there were similiar reports.

> Is there no way POV-Ray could simply check if there is anything in
> scene, and if there isn't, just traces black background?

Nice sky_sphere is also nice scene.

> By the way, sky_sphere doesn't count as object, strangely.

Can you apply typical object's modifiers to sky_sphere ?
Finish, transparency, shadow ?

ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)&_((x+y)*.7,z,.1)&_((x+y+2)*.7,z,.1)&_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35

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"Marc-Hendrik Bremer" <Mar### [at] t-onlinede> wrote in message
news:3c19d314$1@news.povray.org...
>
> bob h schrieb in Nachricht <3c19bd5d@news.povray.org>...
> >Interesting, because checking on that here I get a image rendered, albeit
> >blank one, when camera, camera + light, camera + light + sky_sphere, or
> >nothing at all is in the script (except commented out stuff).
>
>
> Strange, I get the expected result - a gradient y from dark grey to light
> grey
>
> Marc-Hendrik
>
> PII 450, 128 MB, Win 98, Pov 3.5 beta 8.icl

Please excuse me, I didn't use Tim Nikias' script to test with, only my own
which would only be black renders.  Sorry for any confusion caused.

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> I observed crashes on any scene on Windows 95.
> I'll report is as separate report after investigations.
> I remember there were similiar reports.

See "Crash with no objects in scene" posted by me October 26.

Rune
--
3D images and anims, include files, tutorials and more:
Rune's World:    http://rsj.mobilixnet.dk (updated Nov 5)
POV-Ray Users:   http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk

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Wasn't it Rune who wrote:

>> I observed crashes on any scene on Windows 95.
>> I'll report is as separate report after investigations.
>> I remember there were similiar reports.
>
>See "Crash with no objects in scene" posted by me October 26.

I guess I'm going to have to accept that as a confirmation, and add it
to the known bugs list.

It certainly doesn't happen for me

POV 3.5b8, Win 98se, Celeron II 850, 128 Mb

and it didn't happen on my old CPU when Rune reported it

POV 3.5b6, Win 98se, AMD K6 500, 128 Mb.

I've been successfully rendering lots of 3.5 scenes that don't have any
objects, but just perform some calculations and #debug the results.

-- 
Mike Williams
Gentleman of Leisure

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On Fri, 14 Dec 2001 18:34:43 +0000, Mike Williams <mik### [at] nospamplease> wrote:
> I guess I'm going to have to accept that as a confirmation, and add it
> to the known bugs list.

Note we both (Rune & me) report it on 95. IIRC there were more such reports
about this platform. Currently I can't generate proper report becouse no acces
tothis machine but my crashes were on _any_ scene.

ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)&_((x+y)*.7,z,.1)&_((x+y+2)*.7,z,.1)&_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35

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Well, it's not that big deal, since one can run POV-Ray just right away.
But its
a nuisance when you're commenting in and out, and somehow, you forget to
have
something included, and then it blanks away. Perhaps is also just a
Windows98
problem (or 95, 98 being based on that, though Second Edition handles
stuff a
little different).

Well, if it's on the bugs list, that's fine with me. If there can't be a
solution found, that's
fine too. Just never forget to add some invisible objects... ;)

Tim

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Tim Nikias schrieb in Nachricht <3C1A6B40.711BC751@gmx.de>...
>Perhaps is also just a Windows98
>problem (or 95, 98 being based on that, though Second Edition handles
>stuff a
>little different).


No, it runs well under my Win98 (not SE).

Marc-Hendrik

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