Looks to me like the broken texture compression bug.  Usually this is most prevalant on the OSX but I've seen a few people with it on windows too.  First open your planeshift directory which is usually C:\PlaneShift Crystal Blue  - inside that directory is a folder called data.  Browse to it.  Inside data is a folder called config.  Open the config folder and look for the file:

r3dopengl.cfg

Now open that file in notepad.  Look for this line:

Code: [Select]

;Video.OpenGL.UseExtension.GL_ARB_texture_compression = false
and change it to

Code: [Select]

Video.OpenGL.UseExtension.GL_ARB_texture_compression = false
note that the difference between the two lines is the ; at the front.  a ; at the beginning of a line means its commented out.  Commented out lines are ignored in config files so removing it activates the tag.  This will turn off texture compression which might help out.  Also check out the page:

http://vaalnor.mine.nu/psdoc/?q=node/39

and try some of the other fixes.

If nothing still works, try this page to manually troubleshoot the issue - this is a bit tricky though:

http://vaalnor.mine.nu/psdoc/?q=node/44

Good luck!