Graphical Error with Siren NetherSX2 on RP5

Hi all,

I hope someone can help. I’m trying to play Forbidden Siren (Siren) on NetherSX2 on my RP5. The first few missions were absolutely fine but all of a sudden I have this graphical error (see pictures). Has any else experienced this? Changing from OpenGL to Vulken doesn’t seem to make a difference. Thanks!