I've found some videos of earlier MAME versions where the layering appears correct.
This one, using "MAME58" they claim: https://www.youtube.com/watch?v=uur-fwiZJXE
And this one, using WolfMAME 0.106: https://www.youtube.com/watch?v=Jh7zi87YxXk
Plus the arcade version shown here (not sure what MAME version): https://www.youtube.com/watch?v=BrdgchPC83k
Looking at Info of the game and assuming baseline MAME 0.106 was fine, there were changes like these, that seem to relate to the graphics side, perhaps:
0.108u2: Added proms ($0, 20, 100, 300 - Char layer X shift, sprite state machine, sprite Y scaling and video timing). Changed palettesize to 1024 colors.
0.120u1: Couriersud fixed broken starfield in Buck Rogers.
0.129u3: Couriersud and Guru added calculation for capacitors >= 100pf to Buck Rogers LS626 frequency calculation. Formula was derived from figure 6 of LS624/628/629 & 625/626/627 datasheet. The "BUCK ROGERS" title screen is now centered and the big ship appears centered over Buck Rogers ship.
0.130: Aaron Giles fixed graphics corruption on Buck Rogers title screen / ingame (using -autoframeskip).
Edited by VirtuaIceMan (11/11/22 02:27 PM)
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