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JeroenDStout
03-24-2004, 05:54 PM
How to make an objects self-illuminated and emitting photons? I tried using a lamp behind the objects, but it took ages and looked rubbish.
So is it possible to make an material (shader?) to emit photons? Or will I have to try again on the light-inside-object?

(grumble grumble radiosity worked much better grumble grumble)
Bercon
03-24-2004, 06:59 PM
What rendering engine are you using?
JeroenDStout
03-25-2004, 07:01 AM
How silly of me not to mension that :blush:

I'm using Mental Ray.
Texlon
03-25-2004, 11:08 AM
Take a look in the Mental-Ray Shader-Discussion in the resource board, there must be a SSS-shader which does such things you're looking for very well.

Hope that helps, but nearly everything related to MR can be found in this thread.

Texlon
joske
03-26-2004, 05:34 AM
imexp self illum objects in MR can only be achieved using Fgather
so no photons i'm afraid

i did some tests myself, and had a hard time to get shadow casting from self illumin objects,... the self illumination was piece of cake however...

i'll check it out again to be sure, it has been a while...
JeroenDStout
03-26-2004, 09:01 AM
Hmmm... no photons :S bugger.

I hope your tests show some clarity on this thing... and of course I'll check out that MR-shader-disscusion thread out.
joske
03-26-2004, 09:34 AM
ok did a quick test again :
if i use only photons, Mray says 'no light sources present'
so i think it's save to say : self illum works only with Fgather
think about it : photons are from a light source
selfillumin objects aren't lights... as simple as that :shrug:

i tried it again and all works as it should, shadows and all...
donnow why it didn't work a while back?

here's the test :

hope this is of any use to you all?

phil
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