neon glow (objects emitting light)

[mouj]

Hi there, maybe this (http://www.cgtechniques.com/tutorials/viz4-radiosity.php) can help you ?
One thing that might be worth checking is if your object has an Advanced Lighting Override material applied, and if it does then maybe you need to tweak settings there ?

mouj

[flerylight]

Advanced Lighting Override is active and i tried a lot of values there...
[edit]
if i use the tut u posted i get a black screen when i render

[flerylight]

i just reply to keep it on top peeps com'on i need that effect its very important :/

[mouj]

Howdy !

Well all i can say is, if you get a black screen at rendering when following the above tutorial, then you're either doing something wrong, or something's wrong with your Max install.
I did follow the tut and got the expected result.

Check that you are indeed using Advanced Lighting, check that if it is indeed in use, the "Active" checkbox is not unchecked... what else ? There is not much more to it !

mouj

[flerylight]

Which "Active" checkbox do u mean ?

[mouj]

This is the checkbox i'm referring to, it should be checked (default), but i know i happen to uncheck it at times, so maybe you did and forgot.

But i was thinking about something else, do objects that are supposed to emitt light have self illumination on / activated ?
If not, they could not emitt any light, even with the Adv. Mat. Override on, and that woulde be why your render goes black.
You can see that by the the time your radiosity solution takes up to calculate, if it is close to instant / nothing, then it means that no light is emitted in the scene.

mouj

[RussellB]

Another thing to take into consideration whne working with Max's radiosity, and this includes the Override Mat... is that your scene needs to be modeled to scale... If you have a room that you expect to be 6feet by 8 feet, but by Max's scaling is actually 600ft by 800ft, you've got a problem.

[flerylight]

my room is built after the tut and has 5x8 meters or something like that, if i post my scene can anyone check if he finds the missing option ? i think thats the fastest way

[edit]
illuminationtest.rar (http://soete.de/illuminationtest.rar)

[mouj]

Hey i've had a look at your scene, here is what it renders like without much tweaking for me :

http://perso.wanadoo.fr/mouj/wips/images/illumtest.jpg

don't quite know what's wrong, it renders here.
You should be aware though that Radiosity works better anyhow in a closed environement, but it's probably not what prevents this scene to render for you.
Only thing i changed is meshing size (halved).

mouj

[flerylight]

thats what i get

and one question why is the light in your rendering not red ?

[mouj]

Then it is the Meshing options of the Radiosity parameters rollout you need to mess with.
As i understand it, Meshing kind of breaks your meshes in smaller faces, to help refine radiosity calculation. That would be also the reason why it renders this way without Meshing enabled : your mesh (ground object) simply does not have enought faces for light to be calculated properly (bounce and all that), aside from the fact that it is an open environement.

As for my light i guess it's because it is too close to the ground object and light concentration is too strong on a small spot. There is an outer ring of light that kind of goes to red as it fades.

mouj

[flerylight]

i allready tried to raise the number of faces (100x100) for ground and tried messing arround with the meshing i halved it like u but noden the result is allways the red box without anything light

[mouj]

:shrug: :shrug: well i don't know then. Maybe it is that your install of Max got corrupted somehow and only radiosity is going crazy :surprised
I really don't know, it works fine, why would you be unable to make it work ?

Maybe you should try to start over, and try to follow the tutorial once again, try to find documentation on Max Radiosity (F1 ?), or just throw your machine out the window...

sorry i don't know !

mouj

[RussellB]

Are you actually processing the Radioisity before you render? Also, I had to enable meshing in your example file.... though I left it at the value you had there.

It rendered fine for me.

[flerylight]

i enabled it too ... thats just one of my trys to make it work so disabled it in that file.

btw there is nothing wrong with my max5install because if i render the Example Scene from the Neon Glow Plugin it works fine.

And of course i allready did the f1 thingy that was the first thing i tryd to make objects emmitin light!

[RussellB]

Again, I ask... are you PROCESSING the radiosity solution?

[flerylight]

In the Render Dialog Render Advanced Lightning and Compute Advanced Lightning are checked ! I dont know any other option to process the radiocity

[mouj]

You also need to process the radiosity solution before you actually render the scene, so that the renderer can use it, are you doing that ?

Image below shows the radiosity parameters, with the tools that are used to process / reset the radiosity solution.

http://perso.wanadoo.fr/mouj/wips/images/radprocess.jpg

mouj

[Viper3d]

i dont know if it helps any... but I downloaded his scene and went to advanced lighting and started the radiosity... it rendered like his did. I've never messed with advanced lighting before... so maybe its some setting in Max that needs to be messed with? Or maybe in the rendering options?

(edit)hmmm above was with default scanline renderer... this is what I get with brazil. Is this the effect that he wanted?

http://www.viper3d.com/weird-lighting.jpg

[Marcus]

I got this result when turning on the followings...

In Advanced lighting... with Radiosity activated,
under rendering parameters, choose render direct, and tick regather indirect, and I got this:

[flerylight]

thanks all of u i think i know can solve the rest by myself ... the bug was a mix of processing the advanced lightning and the meshing size subdivision stuff.

As i have to say for my defense that i had Compute Advanced Lightning When Required was turned on. So most of the time he processes the Advanced Lightning before rendering.

I will now play with the settings to check what i have to change to achief a result that i need.

Great Help Guys :)

(btw the box glowes now not as nice as a few semples of yours but it glows)

[flerylight]

thats what i need it for ...
the lightning looks not the way i want it but the rendertime was surprisingly long

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