I know there are some people on this forum who have a proficiency with MSPaint, so I thought I'd see if any of them could help me with a problem that's been driving me batty for a very long time. At least ten years and several operating systems ago, I was heavily involved in creating little pieces of largely geometric "art" in MSPaint, laboriously built from mathematically precise arrangements of individual pixels, copy-pasted and occasionally stretched to double or quadruple their original size, all in fashions tailored to the capabilities of the program.
Well, as far as I can tell, Paint as a program hasn't changed at all in the intervening decade-plus, but modern computers have transitioned in large to the use of JPG, GIF, TIFF, and PNG files. Today, for the first time in quite some while, I felt compelled to create one of my bitmaps (Paint files)...it has NOT been ten years, however, because at least once, not more than a couple years ago, I remember trying to recapture these past glories of mine, and made a disastrous discovery. It seemed that all my old files had become somehow corrupted, so that what was previously a razor-straight black line, one pixel wide, across a field of virgin whiteness, was now actually a black line surrounded by a murky gray fog of increasingly pale shades of off-white, pixels of these various tinctures being scattered about randomly. Similar corruption afflicted everything I'd drawn, and eventually I was able to develop a vague sense that somehow, the advance of technology had caused this data destruction. That was as far as I could figure any of it out.
Well today, as I went to save my new file, I noticed a box that I generally ignore in the Save File dialog, and realized that it might play a role in my issues. It allowed me to save my bitmap as "16-bit color", "256 color", "24-bit color", or other various options...and it also offered the option to save as JPG, GIF, TIFF or PNG. Remembering the issues I've had before, and wanting to try and preserve at least one version of the file intact this time, I decided to try saving all of the versions (except for Monochrome, since there wouldn't be much point to that one, as the work included colors). But when I tried out .JPG, the moment I hit save, my picture went all blurry. I quickly hit "undo", and the damage was reversed - but this did NOT undo the save, it instead undid the final edit I made to the file before saving. I then tried .GIF, and again, the moment I saved, the image changed, this time by adding a "dotted line" effect to the part of the picture which was colored light gray or silver (every second pixel in either direction changed to a darker gray). Again, I hit Undo, and the image went back the way it was, as a coincidental side effect of my Undoing the previous edit, without affecting the save file I'd created. I have now verified that the files are thusly affected.
So, my conclusion/conjecture is this: the old files of mine are corrupted because, in the course of some version "upgrade", the computer decided they were more sophisticated than they were, and applied some sort of "filter" to them of the sort that it applies to JPEGs, even though they hadn't actually become JPEGs. I would dearly love to be able to reverse this, putting them back to the pixel-perfect condition they were created in, but I suspect this is impossible (save by absurdly laborious every-single-pixel-by-hand correction, which far outstripped the ambition of even my younger, less having-things-to-do self, let alone his old and tired descendant called me). Once entropy creeps in, it generally can't be ondone, I assume. Even so, I would like to understand the problem, whether or not I can fix it. So, can someone provide me with more information on what exactly I fell victim to here?