anthonymcgrath
08-15-2005, 10:00 AM
ok I have a streetlamp and I created a spotlight that lights the path beneath it. I want the streetlamp to cast volume rays of light beneath it so I applied a volume fog to my spot. edit values - hit render ...result :)
now I want to change the shape of the volume fog and by that I mean the equivalent to what the 'barn doors' option in your spotlight does enabling me to create a small square falloff except I need it to affect the volume fog too but it isn't. my fog isn't affected whatsoever by it :(
my second prob is the decay region - when I turn it on and drop the first decay region to start just beneath the streetlamp_lampMesh that point is also circular.
if I can get that barn doors effect then I'm guessing that the decay region will be sorted too but at present its stumped me. does anyone have any ideas?
cheers
ant
ps: any good mental ray physical light tutorials would be really appreciated - I wouldn't mind getting some nice raymarched fog/light setup in my street scene :)
now I want to change the shape of the volume fog and by that I mean the equivalent to what the 'barn doors' option in your spotlight does enabling me to create a small square falloff except I need it to affect the volume fog too but it isn't. my fog isn't affected whatsoever by it :(
my second prob is the decay region - when I turn it on and drop the first decay region to start just beneath the streetlamp_lampMesh that point is also circular.
if I can get that barn doors effect then I'm guessing that the decay region will be sorted too but at present its stumped me. does anyone have any ideas?
cheers
ant
ps: any good mental ray physical light tutorials would be really appreciated - I wouldn't mind getting some nice raymarched fog/light setup in my street scene :)