sdmoore, I viewed it on my TV screen after pulling the compiled avi onto a track in a new instance of Vegas (again set to lower field order) and also on my monitor. Same ugly horizontal lines on the TV and noticable in the Vegas Viewer. However, when I rendered upper field first it looked just great on my TV monitor and on the computer.

Paul, TV uses upper field first so you should have used the PAL/NTSC Standard template rather than the PAL/NTSC DV Template. You would use the DV template if you are intending to output to DV cam. (I'm puzzled as to why upper field looked OK on your monitor but lower field didn't since monitors are not interlaced!)

Cheers,

Scott

Turns out this footage was taken with a Canon set to progressive scan. I can solve the problem by checking "Reduce Interlace Flicker." Unfortunately the scenes are mixed, some progressive, some interlaced, so maybe I will have to select all events and apply "Reduce Interlace Flicker" to all of them, rather than determining which were progressive, which weren't. This was not needed in Vegas 3. The avi I'm using for render is a 3rd generation (several edits down the line) and I never had to use "Reduce Interlace Flicker" in Vegas 3.

Now the problem seems to have disappeared and I think I was mistaken about it being progressive scan. No, now I can't even duplicate the problem, whether I open the old V3 project or the V4. Project settings are DV-NTSC lower field first. All clips are lower field first, and when I render it renders just fine just as it did in V3. Oh, well, I saw what I saw. It looked pretty bad, but hopefully it "fixed" itself, or maybe, just simply I had something set wrong and unwittingly changed it to the right settings.