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Scalling rotated solid - rendering problem/bug

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Cassius Marques
Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 6:23:07 pm

There is something happening here thats bugging me. Don't remember ever seeing this before, which is odd since its something pretty commom/simple.

I'm scalling a rotated solid just on the Y axis. While at very low values (below 1%) I get these crazy shattered lines.


Am I going crazy/doing something stupid?...or thats a pretty strange render issue?

Here's the same project: 8876_test.aep.zip


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Dave LaRonde
Re: Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 6:28:03 pm
Last Edited By Dave LaRonde on May 29, 2015 at 6:28:19 pm

What are we looking at? A wireframe? One of the Orthographic views?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Cassius Marques
Re: Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 6:33:01 pm

You're looking at a 1080p solid on a 1080p composition viewed at 50%...this solid is rotated at -135ยบ, being scalled on the Y from 0% to 100%.


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Dave LaRonde
Re: Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 7:36:00 pm

Okay, then what are we supposed to be seeing in that screen shot?

Trying to get a grip on the problem, and the screen shot isn't telling people much. Because right now, it looks like a couple of curved, 1-pixel wide lines that are badly aliased.

Is it a rectangular, comp-sized solid? At what angles on x & y? Are you using motion blur? When during the move does this happen? Does it just appear & disappear?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Cassius Marques
Re: Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 8:07:02 pm
Last Edited By Cassius Marques on May 29, 2015 at 8:11:02 pm

[Dave LaRonde] "Trying to get a grip on the problem, and the screen shot isn't telling people much. Because right now, it looks like a couple of curved, 1-pixel wide lines that are badly aliased."

That's exactly my problem Dave, If you scale a single 1080p solid in one axis to 1%. It should look like ONE line right? Do you see the red bounding box thats outside the comp canvas? Thats what the blue should be like to.

[Dave LaRonde] "Is it a rectangular, comp-sized solid?"

1920x1080 square pixel solid, as it is the comp.

[Dave LaRonde] "At what angles on x & y? Are you using motion blur? When during the move does this happen?"

Not sure how to answer that, angle is one dimension. Theres no position change nor motion blur is involved.

[Dave LaRonde] "Does it just appear & disappear?"

Only when scale is below 1%. It flickers and theres a bunch of lines appearing. After that it renders as it should.


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Dave LaRonde
Re: Scalling rotated solid - rendering problem/bug
on May 29, 2015 at 9:05:31 pm
Last Edited By Dave LaRonde on May 29, 2015 at 10:19:35 pm

Must be a bug or AE-OS conflict weirdness.

I just scaled a 1920x1080 3D solid, scaling the z value only -- x and y remain at 100 -- and absolutely nothing happens. Scrubbing the z value for scale changes nothing. The solid's z-axis arrow jumps 180 degrees when you cross from a plus to a minus value as you scrub. That's it.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Brian Charles
Re: Scalling rotated solid - rendering problem/bug
on May 30, 2015 at 3:54:11 pm
Last Edited By Brian Charles on May 30, 2015 at 3:58:16 pm

It must be a bug. Simply making the layer 3D on your sample file solves the problem.

Interesting it doesn't appear to happen in CS6....

8877_rotationcs6.aep.zip



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