 | | | Re: NPR render bugs | Re: NPR render bugs 2005-10-19 - By eric3ddd
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Thank you all for your help troubleshooting. See comments below
Claudia wrote:
> Wow, this *is* frustrating Eric, because it such a neat animated clip.
> Have you noticed that the issue with the lines seem to diminish
> significantly once your camera is "outside" of the barn studio?
> Perhaps that may offer a hint.
They definitely disappear if I hide the "walls" object. So the bug has
something to do with
being inside an object. Having the 4 walls as separate VM objects or all in one
object
doesn't make a difference.
> Also, have you checked the anti-aliasing settings yet? And have you
> tried a bit of a blur of any kind to blur the line edges to see if
> that helps slightly?
The antialiasing settings don't change the length of the lines. They just make
the lines
smoother and render much slower.
> It almost seems to me that you may need to turn various objects off
> and on and do some test renders to see what may be causing this
> problem. The bookcase seems to be the biggest culprit and may be a
> large contributor to the problem. But I am noticing that everything
> with a *sharp* edge seems to be generating these lines, not those
> object with curves or chamfered edges. Digital edges are always
> unnaturally razor-sharp. Perhaps slightly beveling/chamfering edges
> on the bookcase and any other sharp-edged objects may help.
The bookcases are a big problem. I tracked the first "black box" (frame #31) to
one
specific shelf, which is strange since all the shelves have the same master
object.
> Also, have you tried Toon Pro! by DCG? That may help you out in this
> case.
I tried Toon, but not Toon Pro. I like the "roughness" of the NPR and the
render speed can't
be beat (20s/frame on an old iMac)
> Well, I hope you can get your problem solved because it is a really
> neat animated clip.
Thanks. Eovia asked for my original file, so they're definitely looking at this
seriously. But I
may have to wait for CS5 for a complete fix.
> When I looked at your clip again, I noticed something. It seems as
> though this may be a "light through transparency" issue, or lack there
> of. Are you using window objects with glass shaders? If so, try
> taking the window objects out and have just plane frames of the
> windows and glass doors. See it that may make a difference.
The windows are empty. NPR doesn't support transparency or reflections (that's
partially
why it's so fast). I did turn off the "cast shadow" option for the ceiling.
> It just seems as though your lights are reacting to something to
> create these perspective lines. Maybe that is why the exterior shots
> look better; no glass objects to interact with. But this is just a
> hunch.
I think it may just be that it doesn't like objects behind the camera. I'll
test that idea again.
Thomas ?crivait:
> Your animation is a really impressive usage of the NPR ! But you may
> change the interpolation between your kamera keyfrom from linear to
> Bezier. Actually, when you camera change of view, it looks like it
> rotate "by steps", it miss of fluidity.
Merci Thomas. All the interpolation is set to bezier, but I agree that it can
use a lot of
smoothing and better pacing.
Eric
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