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Heh, it's been a while since I've done much of anything in POV...oh well,
here's something new for 2003.
This is the first actual *scene* I ever did in POV SDL and I found that it
took me less time to construct it in SDL than many of my Moray scenes do.
I have to admit, I did cheat a little -- I softened the shadows up a bit
with PSP5. I worked with it for a while last night but couldn't really come
up with any workable results in SDL. Finally, I just got tired of it,
cranked the media settings, and went to bed. ;) Any tips on the deadly art
of shadow softening (without using area lights) would be greatly
appreciated.
Please tell me what you think. :)
-Ian
Post a reply to this message
Attachments:
Download 'chairs-postproc.jpg' (26 KB)
Preview of image 'chairs-postproc.jpg'
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Try making the hotspot of your spotlights smaller. (tightness > 50, falloff
36...)?
That's just off the top of my head, I'll have to try a simple scene myself to
test it.
A.D.B.
"Ian J. Burgmyer" wrote:
> Heh, it's been a while since I've done much of anything in POV...oh well,
> here's something new for 2003.
>
> This is the first actual *scene* I ever did in POV SDL and I found that it
> took me less time to construct it in SDL than many of my Moray scenes do.
>
> I have to admit, I did cheat a little -- I softened the shadows up a bit
> with PSP5. I worked with it for a while last night but couldn't really come
> up with any workable results in SDL. Finally, I just got tired of it,
> cranked the media settings, and went to bed. ;) Any tips on the deadly art
> of shadow softening (without using area lights) would be greatly
> appreciated.
>
> Please tell me what you think. :)
>
> -Ian
>
> [Image]
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"Anthony D. Baye" <ban### [at] Rapidnet com> wrote in message
news:3E530623.5C4A6A4C@Rapidnet.com...
> Try making the hotspot of your spotlights smaller. (tightness > 50,
falloff
> 36...)?
I was actually considering that, but figured it would lower the contrast of
the image (something that I don't want to happen).
> That's just off the top of my head, I'll have to try a simple scene myself
to
> test it.
Here's the code I used for the spotlights:
-----
#declare SpotLite = light_source {
<0.0,5.0,0.0> rgb 1
spotlight
point_at<0.0,0.0,0.0>
radius 2.0
falloff 30.0
media_attenuation on
}
#declare ManySpots = union {
object { SpotLite translate<0.0,0.0,0.0> }
object { SpotLite translate<0.0,0.0,0.0> }
object { SpotLite translate<-0.25,-0.1,-0.25> }
object { SpotLite translate<-0.25,-0.1,0.25> }
object { SpotLite translate<0.25,-0.1,-0.25> }
object { SpotLite translate<0.25,-0.1,0.25> }
}
-----
I tried putting all of that into one light with an "rgb 6", but I think the
current setup gives better results.
-Ian
Post a reply to this message
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Try adding a tightness value. The default is 50... higher is tighter, lower is
softer. You might also try lowering the intensity of your lights to a little
more than half of their respective values.
I'm currently experimenting with the lighting on one of my object concept
scenes, but it's a little slow going.
A.D.B.
"Ian J. Burgmyer" wrote:
> "Anthony D. Baye" <ban### [at] Rapidnetcom> wrote in message
> news:3E530623.5C4A6A4C@Rapidnet.com...
> > Try making the hotspot of your spotlights smaller. (tightness > 50,
> falloff
> > 36...)?
>
> I was actually considering that, but figured it would lower the contrast of
> the image (something that I don't want to happen).
>
> > That's just off the top of my head, I'll have to try a simple scene myself
> to
> > test it.
>
> Here's the code I used for the spotlights:
>
> -----
> #declare SpotLite = light_source {
> <0.0,5.0,0.0> rgb 1
> spotlight
> point_at<0.0,0.0,0.0>
> radius 2.0
> falloff 30.0
> media_attenuation on
> }
>
> #declare ManySpots = union {
> object { SpotLite translate<0.0,0.0,0.0> }
> object { SpotLite translate<0.0,0.0,0.0> }
> object { SpotLite translate<-0.25,-0.1,-0.25> }
> object { SpotLite translate<-0.25,-0.1,0.25> }
> object { SpotLite translate<0.25,-0.1,-0.25> }
> object { SpotLite translate<0.25,-0.1,0.25> }
> }
> -----
>
> I tried putting all of that into one light with an "rgb 6", but I think the
> current setup gives better results.
>
> -Ian
Post a reply to this message
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> #declare ManySpots = union {
> object { SpotLite translate<0.0,0.0,0.0> }
> object { SpotLite translate<0.0,0.0,0.0> }
> object { SpotLite translate<-0.25,-0.1,-0.25> }
> object { SpotLite translate<-0.25,-0.1,0.25> }
> object { SpotLite translate<0.25,-0.1,-0.25> }
> object { SpotLite translate<0.25,-0.1,0.25> }
> }
I frankly can't se the big difference between your setup and area
lights :) Try using a 2x2 area light (4 lights) perhaps?
You can soften the outer shadow like A.D.B. mentioned, but the shadows
under the chairs you must use several lights, either like you do it
now, or with area lights. Or, come to think of it, you can use focal
blur too :)
The image looks great btw! May i suggest making the light cone a little
larger at the top? Right now it looks like the light comes from a very
small source.
--
Peter
-
http://hertel.no/peter
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maybe with an area light and something invisible that confines the area
light to the same area as in your current scene.
Post a reply to this message
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"Ian J. Burgmyer" <the### [at] maccom> wrote in message
news:3e52ddcf@news.povray.org...
Cool pic, but I don't think that abstract chairs in an unnaturally empty
room work with those photo-style lights. The picture looks just empty
rather than simple. For this idea to reach its potential, I believe that
you will have to either go full photoreal or full abstract. Full
abstract would work better, IMO, because photoreal would require that
you define exactly what type of chairs are in the picture, and the ideas
which each viewer had about that type of chair would distract him from
your theme.
-Shay
Post a reply to this message
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"Anthony D. Baye" <ban### [at] Rapidnetcom> wrote in message
news:3E532AA3.F95C4588@Rapidnet.com...
> Try adding a tightness value. The default is 50...
Not sure why you thought so but the new default is actually 0 now in version
3.5 and prior to that it was 10. The following are defaults:
spotlight radius 30 falloff 45 tightness 0
cylinder radius 0.75 falloff 1 tightness 0
I have a feeling this is not very well known yet.
> higher is tighter, lower is softer.
No, again. ;-) The tightness is softer at higher values and sharper at
lower values. What the higher tightness does is to narrow the cone of light
toward the center, thus fading it from center (not radius) to falloff.
Lower tightness makes the cone of light adhere closer to the radius (from
center), and so falloff must then be closer to radius if it is to actually
be *tightened* into a sharp boundary.
Bob Hughes
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"Peter Hertel" <peter@*REMOVE*hertel.no> wrote in message
news:3e533019@news.povray.org...
> > #declare ManySpots = union {
> > object { SpotLite translate<0.0,0.0,0.0> }
> > object { SpotLite translate<0.0,0.0,0.0> }
> > object { SpotLite translate<-0.25,-0.1,-0.25> }
> > object { SpotLite translate<-0.25,-0.1,0.25> }
> > object { SpotLite translate<0.25,-0.1,-0.25> }
> > object { SpotLite translate<0.25,-0.1,0.25> }
> > }
>
> I frankly can't se the big difference between your setup and area
> lights :)
Yeah, that's true.
> Try using a 2x2 area light (4 lights) perhaps?
Heh...that would mean I'd have to *re-render* it. ;)
I didn't really think area lights would give the effect that I wanted, but
while I was coding my latest image, Abstractified, I noticed that area
lights allow you to use them as spotlights. Very handy! I'll probably redo
the lighting with this image -- that was the only thing I wasn't too pleased
with.
I might also add some focal blur. I did a basic post-process blur on the
distant chair and it really improved the look IMO.
> You can soften the outer shadow like A.D.B. mentioned, but the shadows
> under the chairs you must use several lights, either like you do it
> now, or with area lights.
I'll see what I can do with spotlights, but I might end up switching to area
lights. I've found that they're the easiest to get nice results with.
> Or, come to think of it, you can use focal blur too :)
That's always an option. :)
> The image looks great btw!
Thanks!
> May i suggest making the light cone a little
> larger at the top? Right now it looks like the light comes from a very
> small source.
The image was highly conceptual to me (it was inspired by the
povray.off-topic wars that are currently going on) and the only real purpose
for the light is to allow the viewer to see the chairs.
-Ian
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"Apache" <apa### [at] yahoocom> wrote in message
news:3e5360af@news.povray.org...
> maybe with an area light and something invisible that confines the area
> light to the same area as in your current scene.
Area lights are good -- I'll probably end up using spotlight properties in
the area light to give it the same effect, though. I'm not good enough at
SDL for any big lighting tricks. :)
-Ian
Post a reply to this message
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