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Poser F.A.Q (Updated: 2016 Nov 29 4:50 pm)


 Subject: Visible Glowing Lights

Connatic opened this issue on Aug 29, 2014 · 27 posts

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  Connatic    ( ) ( posted at 5:00PM Fri, 29 August 2014 · edited on 5:01PM Fri, 29 August 2014


I was experimenting with Atmosphere and Light-sources after reading a few threads about the subject.  I got a good visible light by using:

Atmosphere - Volume On

volume density = 0.01

volume stepsize = 0.175

The light settings are in the pic.

When I attached Edge Blend to the light Diffuse it made a very interesting effect. Attaching it also to Color makes it even stronger.

 


  piersyf    ( ) ( posted at 5:26PM Fri, 29 August 2014  · @4170948

Nice effect.... thanks for sharing!


  seachnasaigh    ( ) ( posted at 10:44PM Fri, 29 August 2014  · @4170998

     I'd never seen that done with a point light - good work, Connatic.

     My first thought is whether the light cast can be adjusted relative to the glow brightness.  The light cast onto the floor looks overly bright compared to the pink pixie-like ball of light.  This is well worth pursuing;  I like the effect.  :thumbup:

Poser 11 Pro SR 6, in Poser native units.  

OSes:  Win7Prox64, Win7Ultx64, still have a Vista Ult 64 and a WinXP 32bit

Silo Pro 2.3.1 64bit, modo 601 sp5,  Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5, Reality 4.3 & Lux 1.6


  Connatic    ( ) ( posted at 11:00PM Fri, 29 August 2014  · @4171001

The cast glow can indeed be adjusted to change the relativity.  There are the atmosphere settings on the light and the actual atmosphere itself.  As I experimented I could see the ratio change as I tried different settings.  I did not do it enough to recall what yielded the proper balance, but I am sure it can be done.  The Attenuation setting on the Edge Blend has a big effect on the balance of the 2 colors added to the light.

 

I also narrowed the spotlight and it became a tight beam.

Atmosphere also has a Volume Noise which has major effect on this.


  Connatic    ( ) ( posted at 11:25PM Fri, 29 August 2014 · edited on 11:31PM Fri, 29 August 2014 · @4171004

It looks a lot more balance with these settings (I use units=feet):

Atmosphere:

Vol Color = pure white

V Density = 0.022

V Stepsize = 0.133

V Noise = 0.13

Point Light:

Attenuation = Inverse Square

Atm Str = 0.07

Intensity = 0.05

 

Edge Blend Att = 0.3

 

The Atmosphere Noise only works in conjunction with larger Volume Stepsize settings.


  Connatic    ( ) ( posted at 11:42PM Fri, 29 August 2014  · @4171007


Here is a render using the above settings.


  3dcheapskate    ( ) ( posted at 2:22AM Sat, 30 August 2014 · edited on 2:31AM Sat, 30 August 2014 · @4171016

Content Advisory! Nudity advisory.

I'd seen that sort of effect in a couple of renders (e.g. Lenny2's "Jewel" and the 'no postwork comment convinced me it had been done using atmosphere). My own attempt ("Will O'The Wisp" - mild nudity warning)  fell a bit short of the mark and needed postwork. Your last picture above is exactly what I wanted... but in green/yellow.  Thanks for the information on how you did it (using the edge blend seems a great touch!) - I need to fish out the scene file and try using your settings.  :)

Pete Williams (aka the 3DCheapskate) still posts stupid stuff at all the usual places



  rokket    ( ) ( posted at 5:56PM Sat, 30 August 2014  · @4171085

I am missing something, and it's how you are applying the atmosphere. When I apply the settings you posted, I am not seeing the same effect...


  Connatic    ( ) ( posted at 6:12PM Sat, 30 August 2014  · @4171086

@rokket - My first guess would be that your UNITS in prefs is not set to feet.  


  rokket    ( ) ( posted at 6:15PM Sat, 30 August 2014  · @4171087

No, I changed it when you noted that. What I am trying to find out is how you applied the atmosphere. Did you just go into that tab in the materials room and make those changes or did you apply it via the WACROS?


  Connatic    ( ) ( posted at 6:44PM Sat, 30 August 2014  · @4171088

I did not use any wacros.  Just check Volume On in the Atmosphere Mat Tab and enter the settings.

I also did not use Gamma Correction in the Render Settings.  I recall it diminished the effect quite a bit.  I need to experiment with that a bit more.


  rokket    ( ) ( posted at 6:46PM Sat, 30 August 2014  · @4171089

I am using Poser 9, so no GC for me. But what about IDL?


  Connatic    ( ) ( posted at 6:54PM Sat, 30 August 2014  · @4171090

I was not using IDL.  It works when using it, but it adds a lot more illumination, so the ratios between the Glow and the Illumination would need to be adjusted.

 

I have found a few other interesting ways to alter the glow and the illumination.  I will add to this very soon.


  Connatic    ( ) ( posted at 6:56PM Sat, 30 August 2014  · @4171091

Oh, there is one more important condition!!!!!  The light itself MUST be in front of something!

It will not show up over the empty Background.  


  rokket    ( ) ( posted at 6:57PM Sat, 30 August 2014  · @4171092

Ok, that gives me a pretty good starting point.

I will play with it. I'll check back later to see what you have come up with.


  rokket    ( ) ( posted at 6:59PM Sat, 30 August 2014  · @4171093

Quote - Oh, there is one more important condition!!!!!  The light itself MUST be in front of something!

It will not show up over the empty Background.  

BB's Envirosphere? Or maybe a single sided square with visible in camera unchecked?


  Connatic    ( ) ( posted at 7:04PM Sat, 30 August 2014  · @4171096

I simply had my light aligned in front of the ground.  You can see where it cuts off at the horizon.

Just do what I did, or put a box or any mesh behind the light.  The atmosphere does not show up over background.


  rokket    ( ) ( posted at 7:16PM Sat, 30 August 2014  · @4171098

Got it. Thanks a lot.


  rokket    ( ) ( posted at 8:41PM Sat, 30 August 2014  · @4171113


Cool! Thanks again for posting this. I can't wait to see what else you are doing with it!


  Connatic    ( ) ( posted at 8:46PM Sat, 30 August 2014  · @4171114

Nice pic!  


  rokket    ( ) ( posted at 8:50PM Sat, 30 August 2014  · @4171115

It was the result of your work. I just copied what you did. I added a prop wall behind her to catch the atmosphere and make the whole effect work. Trying it with a single sided square near her hand wasn't cutting it.


  3dcheapskate    ( ) ( posted at 2:06AM Sun, 31 August 2014  · @4171136


:biggrin: I found my original PZ3 and tried Connatic's 'more balanced' settings - that's much more like what I was after, (although obviously too bright - the point light in this scene was very close to her face). Next step, trying to get the balance right between the glow and the cast light...

Thanks again for those settings, and the edge blend idea!

(P.S. Poser 9 render, Auto/Final quality, no other lights, backdrop was plugged into ambient on one of the DAZ environment props)

Pete Williams (aka the 3DCheapskate) still posts stupid stuff at all the usual places



  3dcheapskate    ( ) ( posted at 2:44AM Sun, 31 August 2014 · edited on 2:45AM Sun, 31 August 2014 · @4171138


I've got what I was after now. There's probably many different ways to balance things, but reducing light intensity from 0.05 (5%) to 0.02 and changing the edge blend inner color to 192,192,192 (and outer to bright green) look good to me.

I had some problems because my point light was directly in front of her arm. I tried changing various things without success, and eventually side-stepped the problem by simply moving the light!

Once again, thanks for the great tip Connatic!

Pete Williams (aka the 3DCheapskate) still posts stupid stuff at all the usual places



  rokket    ( ) ( posted at 7:37AM Sun, 31 August 2014  · @4171151

That looks really good! I posted a 1920x1080 render of mine in the gallery.


  3dcheapskate    ( ) ( posted at 12:51AM Mon, 01 September 2014  · @4171257

Quote - That looks really good! I posted a 1920x1080 render of mine in the gallery.

Great image - I'm no expert, but a good lighting setup (and I'd now say that a single point plus Connatic's volume settings is a good setup) can work wonders with even the most simple image - somebody's already made a similar comment on your picture!

Pete Williams (aka the 3DCheapskate) still posts stupid stuff at all the usual places



  rokket    ( ) ( posted at 2:14AM Mon, 01 September 2014  · @4171262

I am amazed at how much high praise it has gotten, considering every other image I put in there might get 2 comments, but no ratings, no favorites. It says a lot about the lighting. Way to go Connatic!


  piersyf    ( ) ( posted at 5:51AM Mon, 01 September 2014  · @4171276

Anybody that comes up with an innovative use of Poser lighting is likely to attract as much attention as someone that can use python (Snarlygribbly) or the materials room (Bagginsbill). I can see Believable3d becoming the hair room guru at some point (although for me, not quite there yet).


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