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→Emulation issues: Quick fix.
Several problems occur when running PS1 games, and they become more noticeable at resolutions higher than native internal resolution when using plugins which can increase it like Edgbla's GpuBladesoft, Pete's OpenGL2 and GSDX. Though they're still apparent at native, the low resolution's aliasing and blurriness kills almost any visibility, hiding the issues.
Jittering polygons are caused by low-precision fixed-point (to the native resolution) math. Plugins can attempt to fix this ([[Recommended_PSX_Plugins#Video|GTE Accuracy]]), but it often creates holes in seams. It should also be possible to implement more precise texturing.
The PS1 hardware didn't have a [https://en.wikipedia.org/wiki/Z-buffering z-buffer]. The lack of a z-buffer causes things like polygons popping over others. Tekken character limbs are a good example to see that.Its theoretically possible to implement Z-Buffer in PSX emulators/GPU plugins.<ref>[http://translate.google.com/translate?depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.pl&sl=ru&tl=en&u=http://forum.emu-russia.net/viewtopic.php%3Fp%3D17237 gpuBladeSoft discussion]</ref>
