Homebrew works on Dolphin, not on real hardware

[BossmanRiFT]

[attachment=20170]Not sure where to post this odd one, so starting in General and happy for moderators to move me :-)

We're working on a GameCube demoscene prod - our first on this platform - using the DevKitPro/libOGC/GRRlib stack and the current build is working absolutely fine on Dolphin, but on real hardware (DOL001 PAL, Swiss 0.6-1336), we get graphical corruption/glitches of one of the effects.

While I appreciate this isn't particularly a Dolphin issue, is there any clues as to where we could start looking for clues?  It's almost like Dolphin is compensating and fixing a bug for us that real hardware wouldn't.

Real hardware : [attachment=20170]

Dolphin : [attachment=20171]

[JMC47]

There are some things that Dolphin doesn't emulate. I'm not exactly too knowledgeable in everything GPU wise, but you could try Dolphin's software renderer to see if it's closer to hardware. Otherwise, you could narrow it down to CPU vs GPU by making us a fifolog and letting someone run the fifolog on hardware.