[Kal_Maximus_U669]

Originally Posted by sshtompell

Thanks for your help, I'm already desperate. At first it worked, then it stopped...

Your screens are unreadable it's too small...
here Hud observation periscope = scope filter+cross-air

here the observation periscope without activating anything

here the periscope observation scope filter switch on

here the observation periscope with the cross-air only

here the RAOBF observation periscope without turning on anything else

as I told you check your options

you have necessarily touched an option because I do not have the same composition for RAOBF mine is red or yours is green
now I hope this can help you more consult the internal documents to the mod could also help Regards Kal_Maximus_U669