vray 3.40.02 / VRayDisplacementMod not displayed when switching from vrayRT to Vray

[walee]

I have encounter a problem with the VRayDisplacementMod. I created a scene with a simple sphere and apply a VRayDisplacementMod on the sphere with a bitmap. I rendered the scene with VRAY RT in GPU mode and it worked like a charmed. I then switched to a normal VRAY render and i couldn't see the displacement. Just like if there was not displacement.
i've included my scene file so that you could test it on your end and tell me why i'm loosing the displacement with switching from vray RT to Vray adv ?
Thanks.

VRayDisplacementMod_Probem.zip

[matanov]

You have the modifiers Filter blur set to 1 which produces the flat displacement. RT doesn't respect that option and that's why you can see the displacement there.

[walee]

oh thanks now i feel dumb asking that question in the first place !