I just tried it out again. Looks fine. If there's any tearing it's so extremely slight that you shouldn't even call it "tearing".
Yeah that sound like me, i guess i have to find a way of taking a video of it or maybe see the difference using TV Out.
As you said you see minor tearing, thats maybe what i got but just me being really fussy lol.
Put it this way, i used to buy new PC Games only to find my PC would not play the game full spec (highest settings) with out 100% performance, so instead of lowering settings i put game on shelf untill i get new PC... (loser i know
I do not notice that reflection thingy though....
Just out of interest what settings do you use on picodrive.
I guess as the fixed native emu also has minor tearing but to lesser extent, it could just be the Dingoo has trouble emulating Sega MD as easy as it does others, like how on DS you either had to use R/L Buttons to scroll screen or fit screen but no sound.