If lying items are colliding they will z-fight. It looks very ugly.

Will it be released for fabric 1.20.4 on modrinth/curseforge? I tried to compile myself, but im not very in modding and build fails not finding forge plugin in any repository.

Fixed in the newest version. Thanks for reporting this issue. Sorry for responding that late. Furthermore this fix will also be added to the Full version of ItemPhysic.

New version for 1.20.4 have been released now.