I’m using 8 bit uncompressed footage on a dual 2.7 system with FCP5. In motion, I’m simply scaling it down to about 50% or so. I’ve had better luck exporting an .mov, but bringing the unrendered footage back into FCP, and rendering there, just isn’t clean. It looks like the same scaling issues that FCP 4.5 has. I’ve tried changing settings in Motion, but without any luck. I thought it might have been a field dominance thing, but all settings are set to lower field first.
Rick