Strange seemingly random color saturation differences
I've exported a floorplan I've done from Sketchup to KT and everything appears normal except when I go to render my model. Upon rendering it seems to, almost at random, change the saturation level of certain rooms (walls, floors and shadows). I've uploaded an attachment of my xml file and textures and a jpg render with several areas circled in red to demonstrate what I'm referring to. If you could point me in a direction to fix this issue I'd really appreciate it! I've been going a little crazy trying to troubleshoot it lol.

Thank you,
Chris Burke