Emulator

This really looks like something that could be in the actual game.

Ah ok, you mean that this is a "bug" of that game? That would be funny :)

These games play at 480i for the most part, so it'd be extremely hard for anyone to see a bug like this. Maybe a loss in quality from changing formats?

unbelievable, but why are there no artefacts if i ignore format changes? i will update the wiki page for this game the next time, to document this behaviour.

Did we close this one too quickly?

Even if the blotchy image is how the game rendered (I'm a bit questionable of that looking at the images), why would an option that reduces emulation accuracy "Ignore Format Changes" fix it?

Also, if the blotchy state is how it's supposed to render we apparently need to disable "Ignore Format Changes" via ini for this title.

The issue looks like what happens when a 24b color images is reduced to 16b/8b, perhaps we aren't handling color depth information correctly somewhere.

The issue looks like what happens when a 24b color images is reduced to 16b/8b, perhaps we aren't handling color depth information correctly somewhere.

And suspiciously the "Ignore Format Changes" option deals with conversions between a 24 bit framebuffer and a 18 bit framebuffer.

JMC47 is right, the "glitch" is correct emulation. This is actually two bugs:

1. Dolphin has an enhancement which is impossible to disable (forces RGBA6666 color to RGBA8888). We really should add more accurate behavior and a checkbox on the enhancements page to disable it.
2. When the "Ignore Format Changes" is not checked, certain behaviors of the game can occasionally force slightly more correct behavior. It probably shouldn't.