Thanks for the praise bro The MAME namcos22 driver is Phil Stroffolino's baby. Improvements over the years were done by RB, and more recently by me. In all, it's a team effort.
viva nonno uses Direct3D (7 or 8? I don't know) 1) Yes, sound emulation is not accurate yet. RB can probably give you more info on why this is. 3) Those lighting effects you mention are done by fading the whole polygon layer. It is accurate in MAME AFAIK.
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