object in wrong position in vray render, but not RT or scanline

[dennisqdw]

Ok, this is the craziest thing I've ever seen. I have a plane attached to a finger using the attachment controller (I don't know if this is relevant or not). When rendering in vray the plane is in the wrong position, but it is in the correct position when rendered with RT active shade, and when rendered with scanline. I've attached 3 pictures showing the screen grab, the rt and the vray renders. Any help on this soon would be good as I'm working on a deadline. thanx --ds

[vlado]

Can you send that part of the scene to vray@chaosgroup.com so that our support guys can look into it?

Best regards,
Vlado

[dennisqdw]

Ok, I'm sending it now, thanx. Please let me know when you figure it out as I can't move forward without a solution. --ds

[Morbid Angel]

How did you attach that plane ?

[dennisqdw]

attachment controller

[Morbid Angel]

try reset xform on the plane and redo the constraint.

[trixian]

Are you using a VrayDisplace modifier that is set to not render in RT (and obviously not scanline either)?
This would shift the attachment if the mesh is subdivided would it not?

[dennisqdw]

Thank you both for your suggestions. The displace modifier one is a good one, unfortunately I'm not using that (wish that would have been it). Although I couldn't see resetting the xform and redoing the constraint as making a difference (since the plane was a simple object that had just been created) I gave it a shot anyway. And that didn't help. In fact now it looks even more different, but that's probably because I picked a different face this time just to see what happened. It does make me think that somehow when it's rendering it, wait a minute, I just figured it out in writing this answer. There's a Turbosmooth modifier on the model, set to change the render iterations, but not the display iterations. When I just now changed the display to the same as the render it moved the plane to exactly the same place as it renders. Duh. I should have figured this one out earlier as I kept asking myself what's the difference when it's rendered? So thanx again, as if I hadn't been answering your suggestions I might never have figured this out. Oh well. It's here for someone else if they have the same problem. Although why it was correct in the scanline render is double baffling. Maybe that one reads the attachment before the iterations??

So I guess we can officially close this thread. --ds