Ok here's what you need to know.
Most repainters just use Martin Wright's DXTBmp.exe to convert their 'normal' bmps into extended bmps which is what most textures have to be nowadays - especially if you want dynamic shine and all that sort of stuff.
However, this automatically creates 9 mip-map levels (for reasons of time I'll let someone else explain what mips are for those who don't know).
Now frequently this doesn't cause any problem but often it does (for reasons I can't explain).
In these cases the mip level needs to be reduced down to 1 - ie all the mips need to be deleted except for mip 0 (the main bmp). Result - no blurriness.
To do that you do need a little texturing knowledge, but not much, although really the repainter should have done it for you (but as I say, I think most don't, and many don't even know about it!)
You have to open the offending texture(s) with eg Imagetool.exe that comes with FS, extract the mips, delete all but mip 0 and then resave the texture.
Then you have to repeat the process with each texture - a time consuming but in most cases a thoroughly worthwhile process.
This is how I do it - for all I know there may be another bmp tool that lets you delete the mips directly - if there is I'm sure someone will let me know

Roger