Z-Depth pass problem (Anti-Aliasing/jagged edges)

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Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby FxDesign » Thu Aug 11, 2016 11:50 am

FxDesign Thu Aug 11, 2016 11:50 am
Hello,
I've seen a similar post with no answer, so I wanted to create a new, more detailed post.


I have a problem with the z-depth pass exported (32bit .EXR) from octane.
With Frishluft (or an other plugin), the edges are jagged.
Because this pass seems to be anti-aliased, and to use it in after effects, it should be aliased.

So, what I do know is export my z-depth pass with Advanced render, and I get a better result.

Here are a screenshot to compare the compositing in after effects:
ForumZdepth.jpg
Watch it at 100% résolution

So, Is that an octane core problem, or it can be solved by the fabulous Aoktar ?

Thank you
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby Terryvfx » Thu Aug 11, 2016 2:27 pm

Terryvfx Thu Aug 11, 2016 2:27 pm
Try setting the Filter size to 0 instead of the default 1.2 also try using a position pass instead I thing that one is Aliased for sure.
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby FxDesign » Thu Aug 11, 2016 3:55 pm

FxDesign Thu Aug 11, 2016 3:55 pm
Thanks Terry,

I've just made the test, and it's the same, as you can see in this picture.

Round02.jpg


I thought that it Will work. :(
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby sixtysixxray » Thu Aug 11, 2016 4:37 pm

sixtysixxray Thu Aug 11, 2016 4:37 pm
Here's a tutorial on using a position pass instead of a depth pass to achieve a better result

http://greyscalegorilla.com/tutorials/y ... -is-wrong/
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby FxDesign » Thu Aug 11, 2016 5:45 pm

FxDesign Thu Aug 11, 2016 5:45 pm
This is exactly what I did.
As you can see in the tutorial, he export the P.Pass from advanced render, and he has no problem in the result.

In the past, I hadn't no problem when I wanted to export the Z-pass/Position Pass from Arnold, or vray...

So If you do the test now, you will have the same result as me...


Aoktar, are you there ?
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby Terryvfx » Thu Aug 11, 2016 7:31 pm

Terryvfx Thu Aug 11, 2016 7:31 pm
Well I'm scratching my head right now then, seems like the best thing to do is use the default renderer for this which is perfectly fine but still I would like to know a way to fix this inside the engine.
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby FxDesign » Thu Aug 11, 2016 7:35 pm

FxDesign Thu Aug 11, 2016 7:35 pm
Terryvfx wrote:Well I'm scratching my head right now then, seems like the best thing to do is use the default renderer for this which is perfectly fine but still I would like to know a way to fix this inside the engine.



Yes lol, I'have been trying since a long time too.... I think it's crazy if there is no solution... For a top notch render we should get a proper Z/P pass
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby calus » Thu Aug 11, 2016 7:46 pm

calus Thu Aug 11, 2016 7:46 pm
If you use only 1 sample for info pass and filtering to 1, your info passes are aliased.
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby FxDesign » Thu Aug 11, 2016 8:15 pm

FxDesign Thu Aug 11, 2016 8:15 pm
Good Idea Calus,
So I've tried with one sample and the issue is worn edges now.

1.JPG


It's better, but it doesn't really work

I've tried with 4 - 8 -10 -15 sample and the result isn't better.
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Re: Z-Depth pass problem (Anti-Aliasing/jagged edges)

Postby calus » Thu Aug 11, 2016 8:32 pm

calus Thu Aug 11, 2016 8:32 pm
right , not really usable :D
but as far as I know 1 sample is the only way to have aliased passes with octane. :(
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