Presampling Displacement & LC

[Rhys]

Ive got a scene with quite a bit of 3d displacement, on the grass and a path.

when i come to render using lc, its flicks from building light cache to presampling displacement, and it seems to use about 10% of my cpu.

the system we're rendering on, are 2 x quad core 2.66ghz with 8gb ram.

if i send it as dynamic memory type, it does alot of unloading geomerty.

The scene does have lots of proxys as well. Is there a way i can get the light cache to go faster as when it hits the irmap it use's 100% cpu straight away.

on my vraydisplacement modifier, i have the subd set to 256. could i go lower ?

any help would be great

Thanks !

[Rhys]

oh and the displacement is set to 3d not 2d in the modifys settings.

[ene.xis]

increasing the edge length value will help but beyond a certain value will result in a unwanted displaced result...so find a balance between performace and desired result with it
2d mode would also be less memory hungry!

[vlado]

And also, increasing the Dynamic memory limit option may help.

Best regards,
Vlado

[Rhys]

tried increasing the dynamic memory limit and the edge limit, this still didnt enable the lc to render using all cores.

any other ideas?

[DaForce]

If your using bitmaps for the displacement and your grass if fairly flat, switch back to 2d displacement and see how you go. With a low precision if your grass is infact flat like on a plane.. you will need higher if its on hills..etc..