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Odd Layer Size in Exported EPS File Depending on Document DPI


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Playing around with document DPI a bit, I noticed something odd.

I made a 64x64 px document, with an artboard, at 72 DPI. I drew a rectangle on the artboard, covering it completely, and gave the rectangle a 2px stroke, aligned to the inside. I then exported it as an EPS file. Upon opening the EPS file, everything looked fine:

Original: image.png.4bf6575c10389863a0085854e0ac6d10.png

EPS: image.png.11de951330eb1e29ff2c05dff52fc730.png

 

I then did the same thing, with a new document, at 300 DPI instead of 72 DPI. I know that the document size of the EPS will become 72/300 of the original size, and it did. But something else happened that seems wrong:

Original at 300 DPI: image.png.0f87cdcafd415160139859d2673e950b.png

The EPS it generated: image.png.facab089f0e8cfa059e25caba59019bf.png

When done at 72 DPI, the white layer is the same size as the rectangle with the black stroke. When done at 300 DPI, the white layer is larger, and the rectangle is placed at its lower left corner.

That seems wrong.

my64x64-artboard@72dpi.afdesign

my64x64-artboard@300dpi.afdesign

my64x64-artboard@300dpi.eps

my64x64-artboard@72dpi.eps

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
PC:
    Desktop:  Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 

    Laptop:  Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
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Thanks, Gabe. That makes sense.

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
PC:
    Desktop:  Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 

    Laptop:  Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
iPad:  iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1

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