Sega Genesis no fluent gameplay/textures glitchy

[HansP]

Pi Model or other hardware: 3B
Power Supply used: 12v 2.5A
RetroPie Version Used (3.6, 3.8.1, 4.01 etc.. - do not write latest): 4.1
Built From: ISO
USB Devices connected: 1 gamepad
Controller used: 1 snes controller or USB PS2 replica
Error messages received: **No Error message **
Log found in /dev/shm/runcommand.log (if relevant):
Guide used: (Mention if you followed a guide) n/a
File: (File with issue - with FULL path) rom/genesis/Sonic the Hedgehog (USA, Europe).md
Emulator: (Name of emulator - if applicable) lr-genesis-plus-gx and lr-picodrive
Attachment of config files: (PLEASE USE PASTEBIN.COM FOR LARGE LOGS)
How to replicate the problem: Playing game

When playing attached Rom ( and other roms from sonic (only game i played on sega in the days) ) the textures are glitchy/hanging. the image transition of the textures seem not to go fluently.

i just installed retropie on the SD and booted, no overclocking or any other tweaks.

[dankcushions]

@HansP please do not use rom links: https://retropie.org.uk/forum/topic/2/forum-rules

[HansP]

sorry bout that

[rbaker]

@HansP said in Sega Genesis no fluent gameplay/textures glitchy:

Power Supply used: 12v 2.5A

Booooom!!

[HansP]

@rbaker sorry 5v PSU :D :D

[HansP]

i think i found the solution after a long time of troubleshooting

I forced picodrive emulator and as extra i set the resolution at 640x480 DPK-2 or something instead of default.
no more glitches in the textures!