REQUEST - AMBIENT LIGHT

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régis
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Joined: Thu Feb 15, 2007 6:24 pm

REQUEST - AMBIENT LIGHT

Post by régis » Thu Feb 15, 2007 6:54 pm

Hi everybody,

I used 3dsmax on professional purpose for a long time before turning to Blender. It's quite a while I did it and I really don't regret it.
Of course, there is quite a few things that Blender misses compared to the other very expensive programs but I learned to do without them.

The purpose of this topic is an other thing that other 3d programs have and blender do not. I'm not a programmer but, because ambient light already exist in the program, I cannot imagine it is that difficult to create a POINT LIGHT that creates only AMBIENT LIGHT. An ambient light you can move, attenuate, place at different places...
If you don't now why having ambient light is so cool, just check those tutorial and you'll understand : http://www.cgarchitect.com/resources/tu ... orial3.asp
http://www.cgarchitect.com/resources/tu ... rial19.asp

Ambient light are great because they help you to create GI or Radiosity like rendering without time consuming rendering. It is really handy to control and it helps you to make great rendering on small computers.

After that, if you whant to be able to scale the light's attenuation and create a real 3d snap, be my guest !

kitsu
Posts: 0
Joined: Sun Jun 06, 2004 8:08 am

Post by kitsu » Fri Feb 16, 2007 7:14 pm

Do you mean something like this?
Image
Blend

It's a cute trick. This is just a regular lamp with no specular and a sphere of the correct radius. I don't know if you can scale the falloff non-uniformly like in your links though. This works okay for small square rooms, but for larger or more complex scenes you would be better off stuffing negative lights up into each corner - gives you much greater control too.

Caronte
Posts: 76
Joined: Wed Oct 16, 2002 12:53 am
Location: Valencia-Spain-Europe

Post by Caronte » Fri Feb 16, 2007 9:31 pm

I think Ambient Occlussion is far better and easy to add ambient light ;)
Caronte.
"Some Day, All Will Be Digital"
http://www.nicodigital.com

régis
Posts: 0
Joined: Thu Feb 15, 2007 6:24 pm

Post by régis » Sat Feb 17, 2007 1:14 pm

I tried something like your example before Kitsu but the problem is that you always have darker spot that are hard to control. Of course you can add a bit of the general ambient light but it lights up the all scene then. Whith the ambient light i'm talking about you can have the same kind of rendering as you show but with a smoother effect and easy controlable dark spots as in this example.
Image

Ambient occlusion makes nice renderings but it takes way too much time to render. That's another aspect of ambient light, it doesn't take any time to render. This image took around 30 sec to render on an old pentium 3 1Ghz.

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