by Bruce on Mar 3, 2004 at 2:37:59 am
Currently I'm doing a project that involves mapping video onto 3-D objects with Invigorator AE.
I'm reading in the book about the different settings of antialiasing (3x3, 4x4, 5x5, etc.). This project will eventually be dumped onto Beta SP. In the book it says to use a setting of (3x3, 0.6) for a sharp video render. Am I correct in assuming that if I use a (5x5, 1.5) setting that the video may not look as nice?
The suggested settings are probably best, but a bit of experimentation never hurts.
The trick is to find that magic number, where your edges are smooth enough to limit jittering or vibrations most common on narrow horizontal lines with high contrast -- and to avoid the rendering hit you take when you set both object smoothness and antialiasing higher than they need to be.
For me, there is no substitute for rendering the animation and watching it on a television monitor, as opposed to a computer screen. You may even find that you need to add a slight verticle blur (AE's deflicker filter) to further reduce jitter. Again, the goal is to use just enough to stop the jittering, without hurting the overall image quality.
Re: Antialiasing by Bruce on Mar 3, 2004 at 4:05:54 am
Yes this helps! I was just looking for an opinion from somebody that has rendered video onto 3-D objects before to find out if they felt a 5x5 render looked better than a 3x3 render. I don't want to make the video look blurry so I'll stick with the settings the book suggests. Thanks!
Glad to help... as I said, running a test animation through a NTSC video monitor is the absolute best way to know whether your project will indeed look best using the video sharp setting, rather than another. Sometimes, video smooth (5x5+1) does indeed work best for me on television... even though it looks too soft on your computer monitor. No one setting is best all of the time.
I should also say that the antialasing setting won't affect the entire image the same. Invigorator looks for high-contrast jaggie edges and applies a pixel sampling formula to them, to smooth the transition. High contrast curves benefit most.
A couple other things that can help you get the best quality: field rendering takes longer than doing non-interlaced animation, but field rendering can result in smoother motion. Also, if you're mapping video to an object, be sure AE is correctly interpreting its field order.