Bounding box problem

[Erikas24710142836e]

Hello, I've ran into problem with bounding box, which doesn't match with the edge of a shape, as you can see in a screenshot nr 1. 

 It causes an unsatisfactory result after exporting selection in PNG format.

Where can be the problem and how to fix it?

[Imaginerie]

Can you post a screenshot of the appearance panel alongside your artwork when it happens? Just in case there's something we've missed (a stroke hidden somewhere, an effect of some kind etc...)
Also, just to make sure, can you check you haven't got the snap to pixel ticked in the view menu?

in fact you can test with pixels and grids and see if it changes anything. I had the snap to pixels annoying me in the past...

[Erikas24710142836e]

 Nope, it's a simple rectangle. And no masks.

  Only snap to glyph is ticked. It's strange as I didn't have such problem before 😕

[Ton Frederiks]

How much are you zoomed in?

Does changing Preview help? (Cmd or Ctrl E)

Is this a large document file?

[Erikas24710142836e]

I need to zoom in almost maximum in order to see the mismatch. But the artwork after exporting looks like this (has strokes around):

 In preview mode everything is fine, but the export is still broken.

Document size only 7,2 MB

[Monika Gause]

Just making the black rectangles larger than the artboard is not an option?

[Ton Frederiks]

What is the size of your artwork in points or pixels and what are the upper left X/Y coordinates?

[Erikas24710142836e]

Im working not on artboard, but in "grey zone" and then exporting the selection. Size is 1640x624 px, coordinates upper left X: 316,424 Y: 1490,7427

There is another problem. After I crop the image, it adds a white stroke on 1-2 edges:

 So it looks like it is a bug in my Illustrator, I should reinstall or something.

[Monika Gause]

Please tell us the export parameters. And again: enlarging the objects beyond the artboard is not an option?

[Ton Frederiks · Accepted solution]

Please change the X/Y coordinates to round numbers, fractional values will lead to rounding and can cause additional pixels. Cropping images can also introduce white pixels. Use clipping masks instead of cropping.

[Erikas24710142836e]

Rounding numbers helped, thank you!

Clipping mask increases the size of a file as well as the size of exported artwork A LOT. Is there a way to avoid this increase?

[Monika Gause]

Cropping instead of using a clipping mask is not an option?

[Ton Frederiks]

Yes, a clipping mask is just a window into the image. Nothing gets lost so you can always change it.

The disadvantage of that is the file size. You can crop a copy of the file in Photoshop if you want a smaller image.