using an object as a light source

AlnIS300 · May 17th, 2006

Hello all,
how can i use a rectangular object as my light source for an interior scene? say i want a rectangular glowing table lamp. instead of putting an omni light inside the object, i want the actual object to light up the scene. please help

.
Alan

Rick Eloy · May 17th, 2006

Only when you use radiosity. You can create, let's say, a plane and assign an Architectural material to it. Put the desired value for its illuminance and, under the Advanced Lighting Override tab, check "Emit energy".

tanni · May 18th, 2006

Vray have also that sort of option, You can try.

nisus · May 18th, 2006

What renderer do you use?

nisus

AlnIS300 · May 18th, 2006

i'm using Brazil R/S. please help. thanks.

Alan

nisus · May 18th, 2006

Can't help you with Brazil, ask Quizzy.

nisus

Rick Eloy · May 18th, 2006

Doesn't Brazil have a light material?

tanni · May 19th, 2006

nisus
there have an option under General light option -renderable you may try.
tanni

quizzy · May 19th, 2006

yep, just check the "renderable" in the light modify panel... but you can ofcourse also put planes in the place of the lights to get more control over the reflections.
basically what you do is:

-create an area light
-create a plane with the same dimensions of your area light
-on that plane put a white standard material with self illum at 100 and an output map in the diffuse channel and tweak the RGB value. try it on 8 and render.
-if you have lots of reflective/refractive glossy/non-glossy materials in your scene you get those really nice speculars on your objects..

see attachment for result you can clearly see those nice planes reflecting in the cupboard. this is only possible if you set your output higher as the standard 1...

soulctrla · May 22nd, 2006

Hi,

now i know this is Brazil specific but something i found that can work also it to make a geometry apply a Finalrender advanced material to it and then you can ramp up the GI Send of the object and with self illumination on you can get the object to make light.

I have done this to create soffit lighting etc.

I havn't used Brazil in a long time and as such am not sure if you can do the same thing... its more the principle i was trying to illustrate.

Hope you get it sorted man

May 17th, 2006	#1 (permalink)
AlnIS300 Junior Member Join Date: Nov 2004 Location: San Francisco Age: 27 Posts: 5 Name: Alan Tse	using an object as a light source Hello all, how can i use a rectangular object as my light source for an interior scene? say i want a rectangular glowing table lamp. instead of putting an omni light inside the object, i want the actual object to light up the scene. please help . Alan

May 17th, 2006	#2 (permalink)
Rick Eloy Moderator Join Date: Apr 2002 Location: São Paulo, Brasil Age: 31 Posts: 2,383 Name: Ricardo Eloy	Re: using an object as a light source Only when you use radiosity. You can create, let's say, a plane and assign an Architectural material to it. Put the desired value for its illuminance and, under the Advanced Lighting Override tab, check "Emit energy". __________________ Rick Eloy reb digital - Really, I'm doing it for the kids...

May 18th, 2006	#3 (permalink)
tanni Senior Member Join Date: Jun 2003 Location: Dhaka Age: 34 Posts: 112 Name: Tanvir siraj	Re: using an object as a light source Vray have also that sort of option, You can try.

May 18th, 2006	#4 (permalink)
nisus Super Moderator Join Date: Mar 2002 Location: Gent Flanders Belgium Europe Age: 32 Posts: 3,276 Name: Evert Vandenberghe	Re: using an object as a light source What renderer do you use? nisus __________________ www.ams.be / www.nisusarts.com http://www.youtube.com/profile_videos?user=nisusCGA&p=r

May 18th, 2006	#5 (permalink)
AlnIS300 Junior Member Join Date: Nov 2004 Location: San Francisco Age: 27 Posts: 5 Name: Alan Tse	Re: using an object as a light source i'm using Brazil R/S. please help. thanks. Alan

May 18th, 2006	#6 (permalink)
nisus Super Moderator Join Date: Mar 2002 Location: Gent Flanders Belgium Europe Age: 32 Posts: 3,276 Name: Evert Vandenberghe	Re: using an object as a light source Can't help you with Brazil, ask Quizzy. nisus __________________ www.ams.be / www.nisusarts.com http://www.youtube.com/profile_videos?user=nisusCGA&p=r

May 18th, 2006	#7 (permalink)
Rick Eloy Moderator Join Date: Apr 2002 Location: São Paulo, Brasil Age: 31 Posts: 2,383 Name: Ricardo Eloy	Re: using an object as a light source Doesn't Brazil have a light material? __________________ Rick Eloy reb digital - Really, I'm doing it for the kids...

May 19th, 2006	#8 (permalink)
tanni Senior Member Join Date: Jun 2003 Location: Dhaka Age: 34 Posts: 112 Name: Tanvir siraj	Re: using an object as a light source nisus there have an option under General light option -renderable you may try. tanni

May 22nd, 2006	#10 (permalink)
soulctrla Member Join Date: Aug 2004 Location: England Age: 28 Posts: 42 Name: James Hindley	Re: using an object as a light source Hi, now i know this is Brazil specific but something i found that can work also it to make a geometry apply a Finalrender advanced material to it and then you can ramp up the GI Send of the object and with self illumination on you can get the object to make light. I have done this to create soffit lighting etc. I havn't used Brazil in a long time and as such am not sure if you can do the same thing... its more the principle i was trying to illustrate. Hope you get it sorted man

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