Make sure you're looking at Active Camera when you do your previews. That's the only view that renders even if the scene is 3D.
If you are looking at Active Camera and the shot is what you want, then that's what is going to render. If you are looking at any other view what you see is NOT what you get.
Well, if you "attached" stuff with an expression and use MP rendering, the expression may behave erratic. Other than that I think Rick already provided the most common answer to many of these issues...
Hello Rick and Mylenium,
Thank you for your replies.
Yes, I was looking at the active camera view so I agree it should render as I see it in the RAM preview.
I am not using any expressions. AE created a 3D camera when I ran the 3D tracker. I placed a graphic into the scene and turned it into a 3D layer. The movement of the camera followed close enough to the scene that the graphic stuck pretty well. It needed some fine tuning and I did that with key frames on position. I ran a RAM preview and it looks good.
However the render still doesn't hold the graphic in place like the RAM preview shows.
Thanks for your assistance. I will keep trying things and let you know if I find what I missed.
Post a screenshot of your project and render cue. You can just use the camera icon above to do so.
My apologies for the delayed reply. The file that was giving me trouble was part of a screener I needed to get out. I had hoped to make the tracked file part of the screener but I ran out of time and left it out. I had to do a final render of the file and get it out the door. Now I am back and would like to see if I can resolve this issue to include this in the final render.
Here is a screen shot of my AE file. Active Camera view is on. Again RAM preview looks fine. Final render it is jumpy.
Oh yeah. The drive with all of the clips are at another office at the moment. That is why they are missing from my assets window.
I found out the problem. I had "Frame Blending" checked on my bottom video clip. Viewing it as a RAM preview looked perfect but when I did final render the frame blending portion kicked in and screwed things up. Sheesh. Well I hope this post helps someone else in the future.