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Am 07.03.2011 19:32, schrieb Trevor G Quayle:
> I was doing some tooling about with the latest lighting challenge from 3DRender
> (http://forums.cgsociety.org/showthread.php?f=185&t=955407) which features a
> movie theatre. One of the maon aspects of lighting here will be that coming
> from the screen. I first started using radiosity with an image projected on the
> screen, however it was becoming apparent that it may take some really high
> quality settings to get good results. I then though of using an array of area
> lights created from the projector image. I had already done a lot of the
> mathwork in my lightdome work, so I did some quick conversions to making a
> planar version of it with some nice results.
>
> In the attached image, the first part is radiosity with some low quality
> settings. The second is using the arealight array (16 area lights, 4x4 each).
I guess the area lights array is the way to go for the primary
illumination - though I'd suggest to not go without radiosity entirely,
as I guess it might give an added touch.
When using radiosity, don't forget that theaters typically use pretty
dark materials. Looks like you're using some bright grey for now, which
makes the radiosity scene unrealistically "light-flooded".
In case you want to give radiosity-only illumination another try, don't
forget that you can prioritize objects: Use "radiosity { importance 1.0
}" for the screen, and - say - "radiosity { importance 0.01 }" in the
#default block, then crank up the global settings' radiosity count.
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Am 08.03.2011 02:29, schrieb Trevor G Quayle:
> With early Ridley Scott, you're likely referring to either Alien or Bladerunner.
> One obvious scene to choose from alien. I found a coupl that came out nice
> from Blade Runner.
The 2nd Blade Runner scene you picked gives a nice effect, due to the
difference in color between both left & right side.
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clipka <ano### [at] anonymous org> wrote:
> Am 08.03.2011 02:29, schrieb Trevor G Quayle:
>
> > With early Ridley Scott, you're likely referring to either Alien or Bladerunner.
> > One obvious scene to choose from alien. I found a coupl that came out nice
> > from Blade Runner.
>
> The 2nd Blade Runner scene you picked gives a nice effect, due to the
> difference in color between both left & right side.
Yes, exactly. I may end up using this one for further development of the scene
because of this effect.
-tgq
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"Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> As for John Carpenter, not sure which legendary one as there are many (Escape
> from New York, They Live, Halloween)
"The Thing" for sure!
-------------------------------------------------
www.McGregorFineArt.com
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"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> > As for John Carpenter, not sure which legendary one as there are many (Escape
> > from New York, They Live, Halloween)
>
> "The Thing" for sure!
>
> -------------------------------------------------
> www.McGregorFineArt.com
Post a reply to this message
Attachments:
Download 'matineescene1thing1.jpg' (125 KB)
Preview of image 'matineescene1thing1.jpg'
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clipka <ano### [at] anonymousorg> wrote:
> The 2nd Blade Runner scene you picked gives a nice effect, due to the
> difference in color between both left & right side.
I totally agree, the lighting is really nice and looks like maybe he should be
wearing those old-school red/blue 3d glasses. Maybe that's why he's so
enthusiastic, a cheesy 3d spear just came out of the screen at him or
something...
-------------------------------------------------
www.McGregorFineArt.com
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clipka <ano### [at] anonymousorg> wrote:
> I guess the area lights array is the way to go for the primary
> illumination - though I'd suggest to not go without radiosity entirely,
> as I guess it might give an added touch.
Yes, I may add that in for some subtle addition, but remove the screen image
from affecting it directly.
>
> When using radiosity, don't forget that theaters typically use pretty
> dark materials. Looks like you're using some bright grey for now, which
> makes the radiosity scene unrealistically "light-flooded".
I am using my default diffuse white texture at present for light testing. I
will add textures still.
>
> In case you want to give radiosity-only illumination another try, don't
> forget that you can prioritize objects: Use "radiosity { importance 1.0
> }" for the screen, and - say - "radiosity { importance 0.01 }" in the
> #default block, then crank up the global settings' radiosity count.
Hmm. Is this a new addition? Don't recall it from before. Have to see how it
affects it maybe. It may still be a bit of a problem, as the screen isn't a
small light source relative to the scene size.
-tgq
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"Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> I was doing some tooling about with the latest lighting challenge from 3DRender
> (http://forums.cgsociety.org/showthread.php?f=185&t=955407) which features a
> movie theatre. One of the maon aspects of lighting here will be that coming
> from the screen. I first started using radiosity with an image projected on the
> screen, however it was becoming apparent that it may take some really high
> quality settings to get good results. I then though of using an array of area
> lights created from the projector image. I had already done a lot of the
> mathwork in my lightdome work, so I did some quick conversions to making a
> planar version of it with some nice results.
>
> In the attached image, the first part is radiosity with some low quality
> settings. The second is using the arealight array (16 area lights, 4x4 each).
>
> -tgq
Next stage is the projector lighting. I think this is looking OK. I don't have
the screen area light applied, just a single point light to add a little bit of
additional illumination. This is the part where I was wondering about the light
attenuation, realistically speaking, the brightness of the projector in the
first 1/5 distance is a little too bright (~30%).
-tgq
Post a reply to this message
Attachments:
Download 'matineescene1.jpg' (117 KB)
Preview of image 'matineescene1.jpg'
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> clipka<ano### [at] anonymousorg> wrote:
>> I guess the area lights array is the way to go for the primary
>> illumination - though I'd suggest to not go without radiosity entirely,
>> as I guess it might give an added touch.
>
> Yes, I may add that in for some subtle addition, but remove the screen image
> from affecting it directly.
>
>>
>> When using radiosity, don't forget that theaters typically use pretty
>> dark materials. Looks like you're using some bright grey for now, which
>> makes the radiosity scene unrealistically "light-flooded".
>
> I am using my default diffuse white texture at present for light testing. I
> will add textures still.
>
>
>>
>> In case you want to give radiosity-only illumination another try, don't
>> forget that you can prioritize objects: Use "radiosity { importance 1.0
>> }" for the screen, and - say - "radiosity { importance 0.01 }" in the
>> #default block, then crank up the global settings' radiosity count.
>
> Hmm. Is this a new addition? Don't recall it from before. Have to see how it
> affects it maybe. It may still be a bit of a problem, as the screen isn't a
> small light source relative to the scene size.
>
> -tgq
>
Yes, from the last 1 or 2 3.7 betas, maybe a little more.
With that, you can have samples 10000 for your radiosity, but only for
the objects that realy need that. With a default importance on 0.01,
you'll get an average of 100 samples for most of the scene and up to
10000 for the more important objects.
Alain
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> "Trevor G Quayle"<Tin### [at] hotmailcom> wrote:
>> I was doing some tooling about with the latest lighting challenge from 3DRender
>> (http://forums.cgsociety.org/showthread.php?f=185&t=955407) which features a
>> movie theatre. One of the maon aspects of lighting here will be that coming
>> from the screen. I first started using radiosity with an image projected on the
>> screen, however it was becoming apparent that it may take some really high
>> quality settings to get good results. I then though of using an array of area
>> lights created from the projector image. I had already done a lot of the
>> mathwork in my lightdome work, so I did some quick conversions to making a
>> planar version of it with some nice results.
>>
>> In the attached image, the first part is radiosity with some low quality
>> settings. The second is using the arealight array (16 area lights, 4x4 each).
>>
>> -tgq
>
> Next stage is the projector lighting. I think this is looking OK. I don't have
> the screen area light applied, just a single point light to add a little bit of
> additional illumination. This is the part where I was wondering about the light
> attenuation, realistically speaking, the brightness of the projector in the
> first 1/5 distance is a little too bright (~30%).
>
> -tgq
It don't look to bright to me.
Alain
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