I had a similar experience, but it was using moray2.5 and POV on a DOS
machine. I had an model that included UDOs that were built using
TurboCad and exported as DXFs. I converted them using wctpov26 and
brought them into Moray. If I rendered one of the models, everything
worked fine. However, when I put two or more into a scene weirdness
occurred.

It appeared that the UDO objects woould not process correctly. One or
more of the following would occur to one or more of the UDO objects:

- it would be in the wrong place.
- it would be sized incorrectly.
- one or more vertices would be in correct (usually being WAY out of
position.
- the error was not consistent.

The model looked okay in the MORAY views. POV did not get any errors.
I looked through the exported files and did not see anything amiss
(although there are a lot of files and I may not have checked them all
thoroughly). Deleting and reinserting the UDO object did not correct
the problem. 

There were duplicate (copies) of one UDO in the model. These all
rendered correctly if only one model was in the scene.

If the duplicate models were removed, the scene rendered correctly. 

Stefan
sso### [at] aolcom

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