Thanks all.
Some of that ( AE? ) is over my head.
What I found though is that De-interlacing in timeline properties ( instead of TFF ) fixes the problem 100%. The only down side is that rendering takes longer and anything slower than 50% in timewarp…. becomes ‘notchy’
On another project with only a couple of PIP’s, and kepping TFF….. a 1% blur over the PIP fixed it ( but obviously not RAXOR sharp image then.
How does all the above soound for a fix??
If the other ways are better …. could they be explained in a bit more detail for an idiot ( me ) please 🙂
Thanks for the help to date 🙂
Leigh