Bucket 8 x faster than Single

V-Ray V-Ray for 3ds Max Issues
1

I have a problem I never encountered before :
On a “normal” scene (I used it for numerous other scenes) :
- 11000 faces, 1 character (using CAT) + skin
- 2 lights + area shadows
- Ground ans wall are VRay properties’ mate objects
- Medium animation preset, 360x288 pixel
- Hsphr subdiv = 20, glossy = on

Rendering times use to be almost the same in bucket or single mode.
But here times are very strange :

Bucket mode 52s
Single frame mode 7mn 17s !!!

I don’t change anything except the mode !
What parameter could cause such a huge difference between the 2 modes ???

2

Normally the times are similar… I can’t say what may be causing the difference, but if you like you can send me the scene to vlado@chaosgroup.com and I’ll take a look.

Best regards,
Vlado