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View Full Version : brazil GI + shag hair = problem ?


kerosene
01-27-2003, 11:37 AM
The headline says it all. The shag hair is rendered as render effects , correct? So does it respect the GI lighting of Brazil (not photon maps but monte carlo)

Any opinions appreciated

thanks,
Heikki

ZeBoxx
01-27-2003, 11:49 AM
Heya,

Nope...

Any of the atmospherics/render effects that are capable of being light and/or capable of casting and/or receiving shadows need to be 'aware' of the lighting system in order to be able to actually be lit/cast&receive shadows.

Since Shag:Fur/Shag:Hair are 'unaware' of Brazil r/s skylight, they will not be lit by it, nor will the Brazil r/s skylight cast shadows onto/cast shadows from Shag:Fur/Shag:Hair effects.

There's some work-arounds, though.

For -casting- shadows, you can use a mesh version of the Shag effect. This is explained on the SplutterFish Public Forum here :
http://forums.splutterfish.com/forum/public/cgi-bin/FVwMsgThr.cgi?fid=public&tid=General_Discussion/Brazil&mid=341#341

For -receiving- shadows, and lighting, and consequently casting shadows as well, I'd suggest setting up a lightdome instead - there's various scripts on the web for this.

You could, optionally, make the lightdome setup only affect the shag:fur/shag:hair effect, and let the rest of the scene be lit with Brazil r/s skylight instead.

Not an effective workflow, but such are some of the limitations of 3ds max. Mind you, I'm sure other applications face the same problem :)

Best regards,
Richard Annema

visionmaster
02-20-2003, 01:36 PM
hi :)
here is a try with shag hair and brazil.
Render in 3mn on a p4 1,4 with no mesh version.
i used brazil hair light and put a brzl mtl on hair, with a bit of reflection on it.

zboxx, i am not sure i understand you in my last post..but

:love:
http://membres.lycos.fr/aderouin/hpbimg/essai%20touffe1.jpg

Downpour
02-27-2003, 01:38 PM
Could you explain how you did that in more detail...

...you have done some excellent work BTW

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