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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Nov 11 8:37 pm)



Subject: How do I make a primitive object be a light emitter?


Michaelab ( ) posted Tue, 03 September 2013 at 9:59 AM · edited Fri, 12 July 2024 at 12:57 AM

file_497869.png

I have a flame in Poser 9 and am trying to get the flame to have luminosity in that it **appears** as though it is emanating light. (Yes, I will eventually want to emanate light as well)

Attached is my flame rendered in Poser 9 and as you can see while it is violet it is just a dull color. No vibrance or illuminosity. What do I adjust in the settings to get it to appear as if it is emanating light?

I'll post comparitive flames that are more what I'm trying to achieve and the settings I have.


Michaelab ( ) posted Tue, 03 September 2013 at 10:00 AM

file_497870.jpg

an illuminated flame example


Michaelab ( ) posted Tue, 03 September 2013 at 10:01 AM

file_497871.jpg

my settings


cspear ( ) posted Tue, 03 September 2013 at 10:04 AM

Plug all that into Ambient Color rather than Alt Diffuse, set Ambient Color to white and the ambient value to something higher than 1.


Windows 10 x64 Pro - Intel Xeon E5450 @ 3.00GHz (x2)

PoserPro 11 - Units: Metres

Adobe CC 2017


Michaelab ( ) posted Tue, 03 September 2013 at 10:38 AM

file_497873.jpg

Thank you cspear, that upped the vibrancy but I need to get additional colors in the flame. Attached is what the flame looks like now and the settings but as can be seen the flame is still far from the flame example I posted above and am trying to achieve.


Michaelab ( ) posted Tue, 03 September 2013 at 10:39 AM

file_497874.jpg

settings


seachnasaigh ( ) posted Tue, 03 September 2013 at 11:46 AM

     If you crank the ambient strength of your visible prop high enough to cast light, all you're going to get is a flat appearance, losing the look of depth.

     Give your visible flame prop a gentle ambient value, maybe 0.7-1.3

     Use an unseen prop (un-tick visible in camera) with high ambience (10?  30?  70?) to cast light.

     For intensely bright things like flame or lamps, I like to also add a faintly visible aura.

     There are a couple of threads here in the forum on this topic.  I have a simple torch model in the freebies which uses this technique.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5


Michaelab ( ) posted Tue, 03 September 2013 at 1:09 PM

I made the adjustments recommended and added an unseen prop however when rendered the sphere (midst the flame) seems to reflect the prop (a large disc with ambient value of 50) the flame does not reflect the light from the disc at all.


Michaelab ( ) posted Tue, 03 September 2013 at 1:10 PM

file_497878.jpg

vies


bagginsbill ( ) posted Tue, 03 September 2013 at 1:24 PM

You have maxed out the gradient by following what cspear said to do. The flame was already self-lit quite well. The problem was the rest of your objects and environment are much too bright, combined with the fact that Poser "atmosphere" does not "glow" from self-lit props.

Your magenta flames are now mostly uniform maximum magenta and that isn't going to look good. You want contrast and gradient, not absolute brightness. Darkness reveals light - it doesn't make light darker, it makes light lighter. You need more darkness in your image, not more lightness. You should not see more than 1% of white pixels.


Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)


bagginsbill ( ) posted Tue, 03 September 2013 at 1:39 PM

file_497879.jpg

Observe - same shader you started with, but I put darker colors in - I left the red that was in my original fire shader, and put magenta in place of the yellow.

I did three layers.

One is RGB 179, 26, 121.

One is RGB 147, 28, 135.

One is RGB 187, 4, 155.

None of these are close to maximum magenta, yet mine looks much more intense than yours. Why?

Because the scene is lit very little - only a tiny bit of magenta ambient. (I used the same env sphere I always use but I set the HSV value to .1, and changed the HSV color to 228 158 211.

The rest of the light is coming from the flames.


Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)


bagginsbill ( ) posted Tue, 03 September 2013 at 1:42 PM

file_497880.jpg

Now I took one of my flame layer props and made it invisible to the camera, and I did the cspear 5x luminance change.

One other thing you may be doing wrong - the flame props should not cast shadows. They are pure light - not sold surfaces.


Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)


bagginsbill ( ) posted Tue, 03 September 2013 at 1:45 PM

Oh one other big problem. You said Poser 9, right? So you don't have gamma correction. That matters.


Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)


Michaelab ( ) posted Tue, 03 September 2013 at 2:19 PM

Impressive BB and it looks great!  I wasn't planning on having the environment be that dark. I'll work with you gave above and see how it goes. Yes, Poser 9. What does NOT having gamma correction keep me from having?

Thank you for your input. Your version is close to what I'm looking for. Would just like more of a flame look like the image example I posted if possible.


seachnasaigh ( ) posted Tue, 03 September 2013 at 2:52 PM

Ooooh, that's purty, BB! 

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5


Michaelab ( ) posted Tue, 03 September 2013 at 10:30 PM

BB, when you say: "I did three layers." Three layers of what?


bagginsbill ( ) posted Tue, 03 September 2013 at 10:41 PM

3 stretched spheres at slightly different sizes.


Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)


Michaelab ( ) posted Thu, 05 September 2013 at 12:48 PM

Getting back to this, BB (or anyone else with expertise) how do I get the spheres you posted to glow or to emit light as the flames appear to do in your examples above?


Michaelab ( ) posted Thu, 05 September 2013 at 1:08 PM

And, I forgot to add, for the sphere to have a transparency to it as well.


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