3D Displacement problem

[jonnybefree]

hi to all,
i have a problem with an old projekt.
we've done an animation a while ago, renderd in PAL
and i try to re-render just one still in Hi-res for print.
there is still some displacement in there.
in PAL he tooks 20 min per frame, and in hi-res
i have startet to render yesterday at 17.00 and right now he is still at the first pre-pass!
i'am using 3d displacement, on resolution 3507x2480
irr.+LC
he didnt run out of memory, he's still at 1,4GB.
i'am on the way to render with 2d displacement, but i dont know if it works yet.
can anybody help?

thanks and best greetings

edit:
the 2nd problem: does anyody know how to circumvent the task-timeout in the backburner? we have increase it, but he still gives an error at 600 min.

[jacksc02]

check your irradiance map settings.
You might have to reduce the min and max values for the larger print still.

[jonnybefree]

i have set to -5/-2

[jacksc02]

you might want to reduce it to -6 -4

[gilicom]

try subdividing the object the has 3d displasment , should speed things up.

[jonnybefree]

i have tried with 2d displ. and he is much faster! still at the 3rd pre-pass now.
whats the different exactly between the 3d/2d displ.?

[jonnybefree]

thanks a lot for the fast help jacks & gilicom!
it works now.

but have anybody an idea for the task-timeout?

[gilicom]

its a bug in max 08,07 althow its not marked the netrender will timeout , change it manualy in the advanced option to somthing like 70000

[jonnybefree]

wich options do you mean?
in the backburner monitor i've allready tried to set it to 6000, but he nicely ignored it.

is there another way?

[gilicom]

yeap in the bacburner i set the "wait for max to render = 70000"
mabey 6000 is not enough...
make sure enable is marked