Bizarre bug - pink trees.

[BemusedHorse]

Okay this isn't exactly gamebreaking as such but when I start a campaign some of the more dense trees on the map are bright, luminous pink, not all of the trees just bits here and there, mainly in what would be France, Germany and Poland.
It's not a huge problem, just slightly immersion breaking. Does anyone know what could be the cause? Thanks.

[XSamatan]

Maybe some files weren't properly extracted during the installation progress. Please run validation.bat in your RTW folder and post your results here, so we can see if files are changed. Did you apply any sub-mods?

XSamatan