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I'm having trouble with getting anything to happen with the ceiling lamps.
I commented out the central worklight and I added a point light source to each
of the fixtures - making 6 - and the scene was VERY dark, but took 16 times as
long to render. So it seems that POV-Ray recognizes the presence of the
light_sources but no light illuminates my scene.
Is there a known issue with including a light_source in an object definition and
then invoking the object {} in the scene?
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On 30-10-2014 16:29, Bald Eagle wrote:
> I'm having trouble with getting anything to happen with the ceiling lamps.
>
> I commented out the central worklight and I added a point light source to each
> of the fixtures - making 6 - and the scene was VERY dark, but took 16 times as
> long to render. So it seems that POV-Ray recognizes the presence of the
> light_sources but no light illuminates my scene.
What are the shades made of? I guess a thin, glass-like,
semi-transparent object? What happens when you increase the light output
(multiply the colour by some value)?
>
> Is there a known issue with including a light_source in an object definition and
> then invoking the object {} in the scene?
I don't recall there was one... but that is only me.
Thomas
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Another thought: Are you sure that the light source is not /inside/ an
/opaque/ object, like the metallic fixture?
Thomas
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On 31/10/2014 08:59, Thomas de Groot wrote:
> Another thought: Are you sure that the light source is not /inside/ an
> /opaque/ object, like the metallic fixture?
>
To add to this.
Don't forget the light modifiers looks_like and Projected_Through. They
might help.
--
Regards
Stephen
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On 30/10/2014 12:14, Thomas de Groot wrote:
>>>
>>
>> The way of the world. :-)
>> Recently I transferred all of my PovRay and Poser files from an old
>> machine to a new one. It took all night via WiFi. Now I have to do it
>> again to a desktop machine.
>> BTW Did you know that it is possible to type with your elbows?
>> Another non-standard typing method I have come across is typing with
>> your thumb and first two or three fingers pressed together for strength.
>> I noticed this when I worked for a newspaper. The "ex-hot metal"
>> compositors typed like that.
>>
> Lol! I didn't know that! It reminds me of carillon playing: with fists.
Yes just like that. Hot metal typesetting was a mechanical process
requiring a lot of force.
> I have a cousin-in-law who is a professional player and he sometimes
> uses his elbows too :-) Never tried it myself on a keyboard though ;-)
>
Well to be honest. It was not a standard keyboard. It was a hand built
ruggedised one and the keys were slightly further apart than on a normal
computer keyboard.
--
Regards
Stephen
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Found it.
Parameter (l)user_error was set to "ON". :\
Reading too fast, seeing what I wanted to see, and missing a translate
directive.
(This isn't the first time I've aborted a post because in the middle of trying
to explain what the problem, the error and bleedingly obvious solution jumped
out of the screen and gave my grey matter a good swift kick in the medulla
oblongata...)
Any quick-start tips on dealing with filtered light?
The red I had was WAY too red, maybe the yellow I'm trying now has potential is
I get the filter value right.
I'd like some sort of glow to emanate from the center of the cones without
blasting the rest of the scene with light.
I'm guessing that with radiosity turned on, I need EMISSION in the finish{}
block.
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> I'm having trouble with getting anything to happen with the ceiling lamps.
>
> I commented out the central worklight and I added a point light source to each
> of the fixtures - making 6 - and the scene was VERY dark, but took 16 times as
> long to render. So it seems that POV-Ray recognizes the presence of the
> light_sources but no light illuminates my scene.
>
> Is there a known issue with including a light_source in an object definition and
> then invoking the object {} in the scene?
>
Looks like your shades may not let the light pass through, or maybe the
lights are accidently located inside an opaque part of your fixtures.
You must make sure that the shades have a good bit of transparency. Be
sure that max_trace_level is set high enough. In doubt, increase it by 5.
When using radiosity, backside illumination is also good. Just make sure
that you increase recursion_limit by 1 in that case.
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> Found it.
> Parameter (l)user_error was set to "ON". :\
>
> Reading too fast, seeing what I wanted to see, and missing a translate
> directive.
> (This isn't the first time I've aborted a post because in the middle of trying
> to explain what the problem, the error and bleedingly obvious solution jumped
> out of the screen and gave my grey matter a good swift kick in the medulla
> oblongata...)
>
> Any quick-start tips on dealing with filtered light?
> The red I had was WAY too red, maybe the yellow I'm trying now has potential is
> I get the filter value right.
> I'd like some sort of glow to emanate from the center of the cones without
> blasting the rest of the scene with light.
> I'm guessing that with radiosity turned on, I need EMISSION in the finish{}
> block.
>
>
>
Yes, with radiosity ambient is turned OFF and you need emission to make
something glow.
As for filtered light, trial and error untill you get wat you want...
Also, work with the actual colour of your lights.
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On 31/10/2014 15:46, Bald Eagle wrote:
> Found it.
> Parameter (l)user_error was set to "ON". :\
>
Please tell me how to disable that. :-)
> Reading too fast, seeing what I wanted to see, and missing a translate
> directive.
> (This isn't the first time I've aborted a post because in the middle of trying
> to explain what the problem, the error and bleedingly obvious solution jumped
> out of the screen and gave my grey matter a good swift kick in the medulla
> oblongata...)
>
Great, is it not?
One of the best methods of fault finding (trouble shooting, for those
west of the Western Isles) is to explain the problem, out loud. It often
becomes clear. :-D
> Any quick-start tips on dealing with filtered light?
> The red I had was WAY too red, maybe the yellow I'm trying now has potential is
> I get the filter value right.
> I'd like some sort of glow to emanate from the center of the cones without
> blasting the rest of the scene with light.
> I'm guessing that with radiosity turned on, I need EMISSION in the finish{}
> block.
>
>
>
As Alain said. :-)
--
Regards
Stephen
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Alain <kua### [at] videotron ca> wrote:
> Looks like your shades may not let the light pass through, or maybe the
> lights are accidently located inside an opaque part of your fixtures.
I have the point light sources moved to the proper positions now, what I need to
do is give the impression that there is actually a light THERE - not necessarily
a filament, but that radiating glow that emanates out through the glass.
My knee-jerk reaction is to incorporate media...
> You must make sure that the shades have a good bit of transparency. Be
> sure that max_trace_level is set high enough. In doubt, increase it by 5.
Plenty of transparency, and for the moment I'm using that in lieu of filter.
Off to make adjustments and render it out again...
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