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Disable Layer Aliasing

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Chris Thomsen
Disable Layer Aliasing
on Feb 4, 2010 at 7:49:36 pm

Hello,

i have following problem, so maybe you can help me:

In my Composition (SD) is a PSD-Layer. I`d like to increase the Layers Size, but don`t want that this layer gets "blured".

I use transparency and i want that this layer always shows hard Pixels and hard edges.

Hope, you understand.

Is there an option to keep the layers hardness fixed, even when i "zoom" in?

Greetz Chris


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Dave LaRonde
Re: Disable Layer Aliasing
on Feb 4, 2010 at 8:34:32 pm

[Chris Thomsen] "Is there an option to keep the layers hardness fixed, even when i "zoom" in? "

Sorry, no. This is why the Good Lord made Adobe illustrator. AE can keep the edges of vector files clean, but not bitmap files like Photoshop. And you can't put a bitmapped file into Illustrator and turn it into vector art: it has to be created as vector art from the very beginning.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Chris Thomsen
Re: Disable Layer Aliasing
on Feb 4, 2010 at 9:15:46 pm

Ok, thank you for your comment.

Hope, you all understand my problem.

My problem is not that it is impossible to zoom into bitmaps without loss of quality.

I know the difference between "pixel-orientated" an "vectorized" files.

Greetz Chris


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Dave LaRonde
Re: Disable Layer Aliasing
on Feb 4, 2010 at 9:22:03 pm

[Chris Thomsen] "Hope, you all understand my problem.

My problem is not that it is impossible to zoom into bitmaps without loss of quality. "


Right: you want to keep the edges of the bitmapped files sharp. I recall that you wrote, " i want that this layer always shows hard Pixels and hard edges."

You can't do that with a bitmapped file in AE. You have to use a vector file for that.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Chris Thomsen
Re: Disable Layer Aliasing
on Feb 4, 2010 at 9:32:40 pm

Alright.

Thank you very much. :)

Greetz Chris


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Todd Kopriva
Re: Disable Layer Aliasing
on Feb 5, 2010 at 12:26:58 am

I'm still not sure that I understand what you're asking for, but it may be that setting the layer to Draft mode will do what you're after. (See "Layer image quality".) My reading of the original question was that it was about preventing anti-aliasing. Sorry if I misread this.

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putting the 'T' back in 'RTFM' : After Effects Help on the Web
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Chris Thomsen
Re: Disable Layer Aliasing
on Feb 5, 2010 at 9:26:25 am

YES!!

Sorry for this confusion. My english is not that best, but you understood me very well.

You solved my problem!

First it didn`t work.. because i wanted this effect only for one layer, i had to set the quality in the rendersettings in the exportdialog to "actual settings". ;)

Thanks so much!!

Greetz Chris


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Luke Harris
Re: Disable Layer Aliasing
on Apr 27, 2010 at 8:42:02 am

Hey mate,

I've discovered an easy way to get bitmaps etc to not anti-alias, while still giving you the ability to render at best quality.

Open up Illustrator, drop a bitmap into it, save it as an Adobe Illustrator file.

Put that Adobe Illustrator file into an After Effects, enable continuous rasterising, and even though it's a bitmap, AE treats it like a vector!!

Hope that works as well for you as it did for me... Now I can get that awesome retro bitmap look and combine it with some lighting and 2.5D :)

Luke Harris
Motion Graphics Design
Sydney, Australia
http://www.lukeharris.biz


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Dave LaRonde
Re: Disable Layer Aliasing
on Apr 27, 2010 at 2:37:27 pm

[Luke Harris] "Open up Illustrator, drop a bitmap into it, save it as an Adobe Illustrator file. Put that Adobe Illustrator file into an After Effects, enable continuous rasterising, and even though it's a bitmap, AE treats it like a vector!! "

As far as I know, Illustrator does NOT do any magic transformations that turn bitmapped images into vector images.

As a test, get a VERY SMALL bitmapped image -- 120x120 or so -- in an Illustrator document, import the document into AE, and scale it up A LOT. If your assertion is correct, it should look just fine.

My money says it'll look lousy.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Luke Harris
Re: Disable Layer Aliasing
on Apr 27, 2010 at 10:46:49 pm

It does not "Magically turn it into a vector"

- When you scale up that small .ai file, it merely *treats* it like a vector file, i.e. does not try to anti-alias it. This is not a treatment which suddenly creates resolution where there is none, this is a treatment which when you scale up a bitmap will give you large, sharp squares for each bit as opposed to those terrible AE anti-aliased blurs.

This treatment carries on through to the render stage at full quality renders, very useful for making 8-bit animated characters, even in 2.5D with lights affecting the layers.

Just give it a go, my money has already been put on the table and I don't bluff.

Luke


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Ellis Elkins
Re: Disable Layer Aliasing
on Jan 7, 2011 at 3:44:49 am

try these suggestions from Aharon Rabinowitz


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Jan Vork
Re: Disable Layer Aliasing
on Feb 2, 2015 at 12:45:15 pm

You can also make a 'hires lores' image by increasing the .psd's resolution by multiplying it with an integer (2x, 3x, 4x, 8x) without interpolation ('nearest neighbour'). In that way, AE threat it as hires, but you keep the lo-res look.

http://www.jaydude.nl


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Cole Johnson
Re: Disable Layer Aliasing
on Apr 11, 2018 at 4:29:40 am

Hey! No clue if you're still checking this thread, but just in case I figure I'll attempt to help.

If you still happen to have the original PSD file, simply create a new PSD with the same aspect ratio as the original and copy the old photo into the new file, resizing it to fit the larger size.

Luckily, Photoshop doesn't add anti-aliasing, so this is the best way to get a larger file of a bitmap.

Either that, or I'm fairly certain you can trace it in Illustrator.

Never used Illustrator extensively before, however, and am not 100% sure on that one.


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Steve Bentley
Re: Disable Layer Aliasing
on Apr 11, 2018 at 9:29:50 am

Actually Cole, PS does terrific anti aliasing. But it all depends on how you have your scaling preferences set. There are half a dozen options that let you scale with, say, "nearest neighbor" that will do what you suggest, and the image will be more pixelated when its blown up. But there are also options (in fact the default) that use a bicubic algorithm to smoothly (read: anitaliased) scale the content to make it as smooth as possible even though the scale is increasing. It doesn't generate detail per se but handles edges in an intelligent way. There are also choices for scaling down, which tends to lose detail, so some of the other choices help to over come that.

I think we've missed the boat with the OP due to the date, but I was more concerned that if you think that PS's normal state is not to antialias then you have your settings opposite from what the rest of us usually run at and you are missing some great features in the app.
The other clue was that you suggested copying the picture to another file - this would be no different than simply changing the image size of the original file and choosing the kind of scaling algorithm (nearest neighbor bicubic etc). Scaling is scaling whether its in a new comp or the original.
Check you scaling settings in the prefs.



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Jan Vork
Re: Disable Layer Aliasing
on Apr 11, 2018 at 9:50:32 am

Hi Chris, I use a work-around for this:

In Photoshop, open the file, go to image size, turn on resampling, and choose for 'Nearest Neighbor' as interpolation method.

Then, multiply the current resolution with 2, 4, 8 or whatever number. So, a 72dpi file may become e.g. 144 or 288 dpi, whatever suits your needs. Save the file, and use it.

In this way, the file does look exactly the same, but it has more pixels, and the anti-alias algorithm will do less 'harm' to your edginess.

Best,
Jan (http://www.jaydude.nl)

http://www.jaydude.nl


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Steve Bentley
Re: Disable Layer Aliasing
on Apr 11, 2018 at 9:57:35 am

But for Jan's suggestion to work you do have to have "resample image" checked in the PS image size dialogue. Changing DPI doesn' t necessarily change the number of pixels.
You can do all of this inside AE simply by turning the draft/best switch to draft for that layer. Just make sure that if you subcomp the layer you want to keep aliased, that the precomp layer also has the draft setting. (depending on your prefs this switch can ripple down through precomped layers)



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