No problem. It’s the exact same code, though, so if it doesn’t look as good, it’s likely a matter of using it on the wrong games. Have you tried it with PSX games? or N64? It definitely doesn’t look very good on Super Mario World et al 
what i mean is that it looks different from the one in ppsspp.It’s as though there are more horizontal lines in the ppsspp one with equal spaces between the lines then on the retroarch one which has spaces between the lines that are too big.
There should be exactly as many lines as there are lines of resolution (so, for a system with vertical resolution of 224, there should be 224 bright lines and 224 darker ones). If the spacing of the lines looks uneven, try turning on integer scaling and that should even them out.