Light portal...

[tcamprubi]

would somebody be so kind to tell me what "light portal" is ....
If I make a plan and one area light with this option on, I have no lightning...

By the way,

is there a manual for vray ? as I downloaded a 66 pages's one from this forum but there are no images at all and lot's of thinks are missing (lights for example).

thanks !
;)

[Tong]

Vray manual:

offline
http://forum.vrayforc4d.com/viewtopic.php?t=190

online
http://www.spot3d.com/vray/help/150R1/

but it for Max Vray

?
http://www.spot3d.com/vray/help/150R1/light_params.htm

[Beachtyzer]

Hi all,

I would also know more about Light Portals.
Currently I have the problem to get light into an building in an exterior-scene while using default medium GI-settings and colormapping linear 1/1/1.

Which parameter is responsible for ray-depth? I want to get more light into the lower rooms through the windows.
An area-light with light portal "on" doesn't bring the wanted effect!

Thanks,
Beachtyzer

[stefan]

for hgetting light into the scene you needed no portal actually.

are you sure yoiu have refrative caustics on in gitab?
that you need to get all light through glass.

the portal makes this a bit faster, this is a kind of importantce sampling in vray, so it knows where to exatly look in special.
but also without any portal( i never use one) you get any light exreme deep if you dont forget the refractive caustics to be on in gi.

cheers
stefan

[stefan]

tancrupi i think you have the wrong mnaual,please download the new from the website under learn vray / manual

cheers
stefan