Animation antialiasing filters

[tricky]

I'm rendering an animation at 720P resolution. I know that adding an Antialiasing filter adds to frame render times. I am wondering if it is, in fact, necessary to apply the 'area' AA filter or if I can achieve the same results in post production?

The Image sampler I am using is Adaptive QMC, either at min=2, max=8 or min=2, max=10 depending upon render times.

So, to sum up, is it worth applying an 'area' type aa filter at render time?

[Neilg]

I've not used any sort of filter in years, either stills or animation. Area is just a slight blur (I know theres more behind it, but it just looks blurry)

[tricky]

Neither have I, but I just wondered if the Area AA filter did anything 'special' that can't be done in post.

[vlado]

All the filters do something that can't be done in post exactly, as they operate on sub-pixel level; once the image is rendered, this sub-pixel information is already lost.

Best regards,
Vlado

[tricky]

Thanks Vlado

[crazy homeless guy]

I am not saying this is the best method, but I recently ran a 720p animation using DMC 1-4, and then time warping in Aftereffects to add motion blur and it turned out a fairly stable video.

[tricky]

I am not saying this is the best method, but I recently ran a 720p animation using DMC 1-4, and then time warping in Aftereffects to add motion blur and it turned out a fairly stable video.

Time-warping? Sounds interesting. Will take a look. I plan to use a combination of Frischluft DOF and ReelSmart mblur.

[joconnell]

The information that the antialiasing filters get is far larger than you'd feed into a blur op in a compositor so you won't be able to recreate the look. For sharper stuff like print images / stills the unsharp mask in photoshop has always done me good as a non destructive version of catmull and for video stuff I'd normally go either area, mitchell in some cases or none. Something like the video filter is probably closes to a blur and I'd only use that in rare cases where I'd get a lot of pixel creep / shimmer. Again motion blur would be a far better option, albeit at a higher cost.