As I thought and fumed about this, my son suggested it might be a video card problem, so I copied the file to another computer, and problem gone! So thats' it....I guess it also means I need a new laptop. Thanks for your input

I turned on the "use maximum texture size" and still no change..I have re-drawn that wall 8 times thinking it was out of plane somehow, still no difference. The model I uploaded is the same as the youtube video, and in fact its still doing this. But when I erase the middle windows it goes away. If this problem is not on the file you downloaded from here, perhaps its some display situation?

thx

my model is fine until i add a material to the surface with openings. when there are four openings, the material renders fine. when i add openings in between the others, the rendering gets messed up. it flashes and gets pixelated. there also seems to be an issue with transparency in the geometry overlaps. i think its similar to the problem stated in this post: http://www.sketchucation.com/forums/scf/viewtopic.php?f=79&t=18270

is this "z fighting?"

heres a screen recording of the model, before and after adding a material to the surface: http://www.youtube.com/watch?v=RkNRIZYTZVQ

i'm using windows xp and sketchup 7.0.10247

thanks

romeo.2.skp