Are you talking the emulation approach used in the PS3 version of Monster Hunter Portable 3 HD?
Back in the Summer of 2011, Sony announced that they would be remastering PSP titles and releasing them for the PS3. It seemed like a great idea: the NGP had been announced a few months before in January and the PSP had been as good as dead in the West for some time. Monster Hunter would...
www.neogaf.com
Tokyo, May 22, 2011– Sony Computer Entertainment Inc. (SCEI) today announced that a new “PSP® (PlayStation®Portable) Remaster” title series, PSP titles customized and developed specifically for the PS3 computer entertainment system, will become available as Blue ray Disc™ games starting in the...
sonyinteractive.com
I've always been curious about what that was and what it was capable of (and if it was ever cracked? I see a "psponps3" app mentioned for PS3 custom firmware but I'm not sure if it's the same application?) I have seen mention that it included texture packs as well as the documented other native PS3 features like SixAxis/DualShock support or sometimes 3D display, but I actually have never been able to confirm that texture packs were included in the release? The HD version had clear visual improvements, and I always thought that a texture pack was what Sony was describing when they announced the PSP Remaster line, but when I look at the games, it seems a lot like the PS3 emulator did the enhancement (underneath the UI, which is important, and the UI is still the blocky PSP material which further indicates that assets were not replaced) rather than new assets. I looked to see if hackers have ripped the PS3 "texture pack" and patched it into new emulated versions of MH3P, but I see conflicting info as to whether those textures ever actually existed.
*BTW, I'm greatly disappointed even today that the whole PSP Remaster initiative went nowhere; it also never "came to Vita", if that were to be a thing. We never got any of the six games released through it in America on PS3, and although a few game developers made their games playable on PS3, games like MGS Portable Ops or Resistance Retribution oddly didn't use this tool and had their own feature systems. Could have been a great feature IMO.
(For posterity, the PS3 games which used PSP Remaster were the
Monster Hunter Portable 3rd, the
Legend of Heroes: Trails in the Sky trilogy aka TotS, SC, and The Third,
K-ON! Ho-kago Live, and
Dynasty Warriors Multi-Raid 2 aka StrikeForce 2.)
There's some surprisingly detailed levels and special effects for the PS2 once you get past the opening school level, should look decent at a higher resolution