Anti-aliasing and Flickering/Moire

[tommygdawg]

Hey all,

I've got a question here that's really bugging me, and it's really hard to figure out a solution due to render times. I've got this scene I'm working on, here's an example shot of the problem:

You can see on the rails, especially further back into the scene, we're getting an aliasing problem as the camera moves. I've tried everything I can think of. This shot was rendered at 720p, but I also tried a 1080p render to no real difference. I've tried really upping my area filter up to even 4 with no real difference.

Part of the additional problem to trying to figure this out on my own is every time I try a setting change I have to wait for a good 15-20 frames to render again before I know if there's any difference.

Do any of you have any idea how to fix this issue? By the way, I'm workin on V-ray 2.5 and Max 2012.

Thank you!

[joconnell]

Your rails are probably slipping between pixels through the shot - higher max aa for you, probably something like 2 / 16 or 2 / 24 for starters, otherwise motion blur.

[tommygdawg]

Your rails are probably slipping between pixels through the shot - higher max aa for you, probably something like 2 / 16 or 2 / 24 for starters, otherwise motion blur.

Hey, Jo. Thanks so much for the feedback. Could you please elaborate on what you mean with those numbers? Are those for max subdiv settings or something else?

[Morbid Angel]

Your rails are probably slipping between pixels through the shot - higher max aa for you, probably something like 2 / 16 or 2 / 24 for starters, otherwise motion blur.

I think he needs to go more then 2 min, 3 or 4, and very low threshold. Like 3/32 0.005 or less. Reason being, you are dealing as joconnell pointed out with thin lines, when they get below 1 pixel they simply disappear. When you are dealing with thin horizontal or vertical lines, this problem is especially noticeable.

[tommygdawg]

I think he needs to go more then 2 min, 3 or 4, and very low threshold. Like 3/32 0.005 or less. Reason being, you are dealing as joconnell pointed out with thin lines, when they get below 1 pixel they simply disappear. When you are dealing with thin horizontal or vertical lines, this problem is especially noticeable.

Thanks for the advice! This is probably very noobish but could you please elaborate on what you mean by the numbers you specified, such as 3/32? I know what the .005 is, but I'm at a loss on what the rest means.

[Morbid Angel]

In your dmc sampler 3/32 means min subdivs 3, max subdivs 32, noise thresh 0.005

[tommygdawg]

[ATTACH=CONFIG]26356[/ATTACH]

In your dmc sampler 3/32 means min subdivs 3, max subdivs 32, noise thresh 0.005

Ah, gotcha! Should have known what you meant, thank you! I'll give it a shot and let you all know if I'm still having issues. Appreciate the feedback!