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Crimguy

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Seems to have started with the release of Yosemite. See screenshot. It flickers and gets all kinds of weirdness... Does not happen with EUIV. Screen Shot.jpg

Anyone have any idea for a solution?
 

AndrewT

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Looks like a video driver issue to me - we had issues like that when 10.9 came out too. What video card and Vram do you have? Look in Steam-help-system info if you're not sure.

Also, try turning off shadows.
 

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I have the exact same problem, I'm using the AMD Radeon HD 6970 2048 MB with a 3,4 GHz i7, Running with 16GB RAM, oh and I'm using Yosemite 10.10
Edit: How do I turn of shadows?
 

AndrewT

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It's right there in the game's graphical options, is it not?
 

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Try changing it in the settings.txt file (or equivalent) in whatever the mac has as the equivalent to the documents folder where your savegames are also stored.

Documents/Paradox Interactive/Crusader Kings II/settings.txt

In the graphics section you'll see a line that says shadows=yes (set it to shadows=no), also set multisampling=0

Not noticed gfx issues on 10.10 myself as yet but have UI CTDs issues anyway so game isn't playable right now.
 

Crimguy

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Played with the settings in there, thanks. You can create some glorious crashes with that file ;-D

It appears it's the multisampling setting. Changing it to 0 indeed fixes the problem. Thanks all for the help!
 

LarryLeica

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Played with the settings in there, thanks. You can create some glorious crashes with that file ;-D

It appears it's the multisampling setting. Changing it to 0 indeed fixes the problem. Thanks all for the help!

yes, the multisampling does nothing but cause issues, so I've always had it turned off. Glad it helped you out.