> IMHO the "hardware scanlines" in pre 0.106 shouldn't have been removed from MAME when the video core was rewritten, even if they were wrong with vertical games (they were horizontal, not rotated with the game...). Now people try to reproduce that effect with HLSL... Oh... I voted YES at the poll.
The problem with the 'hardware scanlines' feature is the (I think integer) scaling means the image is going to get re-sized dependent upon the game and your monitor's resolution. HLSL doesn't have this issue, and the occasional game where scrolling might make it look like the lines are 'above' the graphics is a far lesser evil.
Also, why pre-.106? The png effect wasn't introduced until at least .107, and the hardware scanlines feature wasn't taken out till at least a few/several cycles later.