Hi all.

I installed Penumbra Overture on Linux using wine and PlayOnLinux software (had to do it because there is no Linux version on GoG).The game runs "fine" bun when I have Post Effects turned on nothing is displayed (game runs normally but all I can see is black screen and some icons (like hovering over moveble object). When I turn off post effects I can see everything but the game lack all the shadows and lightning (makes using glowing stick and flashlight pointless).

Is there any way to make this game look normal?

I'm having a similar problem with Black Plague. By any chance, did you install your game in "Z", aka the Linux home folder? When I ran the installer via Wine it insisted on using "Z".