Posts by Niklink - melonDS board


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Niklink

Posted on 02-15-18 01:57 AM, in Desmume comparison/image differences (Phoenix Wright: Ace Attorney) (rev. 2 of 02-15-18 03:39 AM)

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So I was taking screenshots of AA1 for unrelated reasons on both Desmume and melonDS when I noticed a slight difference between the image presented on each one. So I went ahead and took an identical screenshot from each to point out what I mean. It's subtle, but it's there:

[image]

In case you don't want to squint too much, there are two differences between the images. The first and most obvious is the difference in transparency. You can see the background behind the dialogue arrow box in the bottom screen more easily on Desmume. The image diff also appears to show a similar thing happening with the text box on the upper screen. Simply put, it appears that there is a difference with how transparency is handled. The second, more subtle difference is that the image in Desmume is apparently producing a slightly brigter image overall that melonDS (fun fact: the screenshot feature in Desmume turns images darker instead, which almost had me writing the opposite thing until I thought to check manually). The difference is quite small, usually somewhere between 010101 and 030303's worth of additional brightness on any given color.

So, two troubling differences given that one emulator is aiming for a higher degree of accuracy and the other has had years to ensure precision. At this point I went and grabbed my 3DS to try to get a real hardware comparison. Unfortunately I have no way of getting screenshots of DS games so I just had to make do with squinting. As far as I can tell, the transparency issue on the bottom screen looks much more like melonDS than it does Desmume, but I can't be authoritative about it. And the brightness issue, I have no way of telling given the differences between a 3DS screen and a computer monitor. In any case, given that melonDS' 2D graphics are supposed to be well underway, something to think about. Which emulator is in the wrong here? And why?

Main - Posts by Niklink

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