Some games pixelated namoi, dreamcast any help

some solution i probe in emuelec 3.0 ,4.0,.4.1,and4.2 problem is same

Can you please stop posting this? I told you already 2 times already this is not an EmuELEC problem. That is how the emulator works, these devices are NOT PCs you cannot have them render at HQ, use a PC for that.