hi tronik .

i got the same problem & i found that if U are gonig to change the materialls setting in SU (Like scaleing, rotating , Colors & ...) many time the chages dosen't apply to V-Ray. (and i think that it happend when You are useing one kind of matterials in to form like one brik with to scale in one file or with to colours)

I use this to remove it but i think there must be a beter way.
1 - i export the materaills to JPEG.
2 - do what i want to do with that in Photoshop and save as JPEG
3 - Import image as texture and use it on somewhere (every where i want)
4 - save that to .skp file and use it.

I use this setting.
First Restore Default on Rednder Optins. (by Clicking on file -> Restore...)
then :
Render Options -> Camer -> Shutter Speed = 900 (leave the others on default setting)
Render Options -> Environment -> GI (Skylight) -> (Click on M) -> Intensity Multiplier = 0.1 (leave the others on default setting).