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GIMP/GL QuestionsWhat determines a file size? (Showcase | Slideshow)

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RJKD

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What determines a file size?

Post#1 by RJKD » 06 Dec 2016, 19:43


Below are 2 screen grabs of projects, one with a fair bit of work done with 17 layers the other just started with one layer. The only difference I can see is the resolution (again I have looked online but the terminology baffles me, probably because I don't really know what I'm looking for)

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Post#2 by Tom » 06 Dec 2016, 19:47


300 pixels per inch vs 72 , I think
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Post#3 by runSPOTrun13 » 07 Dec 2016, 03:46


Just having a couple layers can easily double the file size. Also keep in mind that the xcf is saving every step you took, including erasing, backtracking, and layers you decided to not use. For a real test, try a new project, and save it early, then check it again later. In my experience, it's real easy to go from 500kb to 5mb real fast (x10).
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Post#4 by Tom » 07 Dec 2016, 14:42


I made 2 images, they are both 1 inch x 1 inch.
The first one is with 72 pixels and use 89.6 Kb
The second is 300 pixels and is 992.1 Kb , almost 10 times the size.

My guess is the 640x400 was a new image you started from Gimp by selecting new image 640x400 and Gimp's defaults 72 pixels size.
The other you would have had to select advanced from the same dialog for image size and selected 300 pixels.

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Post#5 by RJKD » 07 Dec 2016, 15:38


Thanks Tom
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