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barnabythebear
02-21-2003, 02:49 PM
Hi,

Does LW have the ability to render out an Ambient Occlusion pass? I've just been playing with a free Ambient Occlusion shader for Electric Image and i'ts pretty cool.

ta


nige.

Red_Oddity
02-22-2003, 12:28 PM
What exactl does the Ambient occlusion do? Can't you just turn Ambient lighting off?

Halsu
02-22-2003, 04:16 PM
Here's an example that more or less does what desired?

http://www.newtek.com/products/lightwave/tutorials/rendering/lw_baker_beethoven/lw_baker_beethoven.html

barnabythebear
02-22-2003, 05:12 PM
Hi,

Occlusion is a way of capturing 'shadow zones' that are greyscale images of your scene that can be used to control ambient or diffuse channels etc. You can get quite photo-real results using it without having to use radiosity. I noticed that its also in the latest version of Pixels 3D. To be honest I don't know the math behind it. It just gives cool images!!!

If you go to this url:

http://www.konkeptoine.com/2free/freestuff.htm

and download the occlusion 1.5 demo your'll get a pdf manual too. it explains it better than I can!!!

ta


nige.

Halsu
02-23-2003, 09:01 AM
Eetu's Grit also does the same thing

http://katastro.fi/~eetu/grit2/

Red_Oddity
02-24-2003, 04:19 AM
Soooo, maybe i'm still not getting it, but if it is what i think it is you mean....
Then why not just use the gMil shader ?

ingo
02-24-2003, 05:49 AM
Yes youre right, its nothing more like a gMil shader for Electric Image. Back from the days when raydiosity was very slow. But now i think you can do the same faster and more accurate with raydiosity.

barnabythebear
02-24-2003, 06:38 AM
ummm. always wondered what that gMill thingy did :D

How do I go about using it?

thanks

nige.

Red_Oddity
02-24-2003, 07:04 AM
Just bang it on a surface (one you use offcourse) and experiment (try turning the occlusions from off to on, this gives those darkened areas your probably looking for)

ingo
02-24-2003, 11:02 AM
Just look at http://www.eliteops.com/sama/whatisgMil/index.htm or at http://www.altyna.com/lw/Gmilartmode.htm