Weird Purple Textures

I can't remember exactly when they appeared, but maybe after I alt-tabbed.
I've restarted Empires and Steam, still no luck. There's also some weird lines showing up on certain textures.

http://img367.imageshack.us/img367/3914/empcrossroads0000ei3.jpg

http://img292.imageshack.us/img292/7249/empdistrict4020006nz3.jpg

http://img292.imageshack.us/img292/9973/empcanyon0000ug7.jpg

http://img201.imageshack.us/img201/2052/empslaughtered0004gi5.jpg

http://img167.imageshack.us/img167/5039/empstreetsoffire0005ff8.jpg

 

I'm not an expert, but I'd say it's graphics card related.

 

Looks like you're missing half of a blend texture.

I'm not so sure about the lines on district and SoF though.

 

that first one of crossroads actually looks better then what it should look like

 

Those are missing textures. Alt-tab hates Source (or is it the other way round? ), I advise running in a window if you need to switch apps frequently.

 

Yep.

I had an ATi Radeon 9800 pro, and sometimes I got crazy stripes on my screen.

 

Emp USED to crash on alt tab. In vista, I can alt tab fine. Kinda slow/annoying, but it works.

 

Bodrick is right.. Sometimes whole textures get missing that way. I can only assume windows unloads those textures on alttab and Source doesn't reload it on alttab back..

oh and it did this on my 6600GTS and my 8800GTS

 

When i alttabbed out of HL2 i always got "redownloading all lightmaps", but that doesn't shows anymore in the console.

 

I think what happens is that source doesn't reload the textures when you alt-tab back in. Hence if you don't have enough texture memory, windows overwrites the empires ones, and doesn't reload them when you come back in = Source thinking you have missing textures.