also why did the arcade mode never use any MK3 backgrounds?
All it ever used was the UMK3 added backgrounds............. even though the mK3 backgrounds were in the game

The color distortions were unique to Mame.

As for the Backgrounds, they cycled through a specific order. They would get to the classic MK3 levels if you played enough, not sure though what the order was like or how many people you had to fight to really start seeing the MK3 ones.

Well, thats happen with me a lot

I only do not unlock classic sub-zero, and the game goes well. If i unlock 3, the glitch.

About MK3 background they are in the game, but you fight in the UMK3 for 2 times. The order goes 2 times with the UMK3 background, and only after you get MK3 backgrounds.

MK3 Bank is not on there (i love that background, too bad)

If you do an uppercut in scorpions lair all time, you never get MK3 background because the order goes infinitely.

The order of BGs in UMK3 is the same no matter what, whether you uppercut someone through or not, on any stage that has that property.

Select Double Master, and play through and lose once, without ever uppercuting on Scorpion's Lair, on the second Endurance, you will be on the Subway. Play and uppercut through Scorpion's Lair the first time you play on the stage, lose one match, and again on second Endurance you will on the Subway, once again starting the old school stages. Then finally, play through and uppercut through both times you play on Scorpion's Lair, lose once, and on the second Endurance you will be on the Subway.

Pretty much the only reason you don't get to see the old BGs is because you might not be playing on Double Master, and also, if you are, maybe you're not losing any matches.

I really wish they would fix that pallet glitch on the selection screen, sometimes it happens on Choose Your Destiny as well. It's annoying.

Matt