@valerostudio said:
Displacement kills CPU, use it sparingly. Also, try to get away with using lower subdivs and and a higher edge length. On high res renders you can sometimes get away with an edge of 20+ pixels. Try it out.
Thanks for good advice but in this situation i used edge length 1,0 without 'use global' option to make it real, full of details. Finally for the high resolution render i made it with fur plugin. it looks better i think:)
Solve. if i turn off displacement (which was only with one towel) everything goes fast!
Whith rendering exr file its still about 30-35% of cpu. small diffrence but not help to much:p
I set priority for sketchup process in windows and unchceck the low priority render option in vray.
Hi.
Maybe you know why my cpu slows down to 20% while rendering 3500x2500 image. It goes 100% at smaller res. like 1600x1200 and it takes about 2hr. my laptop cpu i7 2630 jumps to 2,7 ghz and memmory work 50% of 8gb while rendering and its normal. Render time big image is so long and i got work for yesterday 
I use latest version of skp and vray.
Help!
i set only IM with DMC and the scene has 12mb
Thanks for your response guys. I hope they'll make it for 64bit. Now my 12 gigs are waiting for a new version:)
Hi this is my first post.
I use sketchup 8 with vray 1.49 on I7 2630qm processor, 12gigs RAM nvidia 540.
I have problem with time witch is before opening the render window. For exemple file 40mb with building and some Fur grass make it 380000faces.I uses some emmisive material too. I made 800x600 render in 5 miniutes but I was waiting 10mminutes for opening render window. Is this normal? Im scarred to think about some 100mb files. I thoght that inceasing ram from 4 to 12 will do the thing but it wont.When I delete the fur grass it takes about 10seconds so its very big diffrent. Anybody help how to reduce this time???