weird squares/ pixelization? see screenshot

[ShawDAMAN]

On certain flight/jet stream effects (and on a few custom maps, that have chimney smoke) I get this strange pixelization (for lack of a better word)
link:
http://imageshack.us/photo/my-images/97/opppp.jpg/

Most such effects work fine though. Anyone else have this happen? This is in FFV3R and here the mesh is of war machine by grenadier (not that that makes a difference as it happens with select other meshes too, but I thought I'd forestall any questions. )

[Previsionary]

Looks like you're having an issue with alphas. What kind of graphic card do you have and what are your settings?

[ShawDAMAN]

The graphics card is an "ATI radeon 4200 HD" (integrated graphics.)  There's not much I can tell you about settings unless you have something specific in mind 

The resolution is 1280x1024, 32 bit..... I have all FFvT3R's settings maxed (and the game runs beautifully, save for this one anomaly) I have no anti-aliasing on.... beyond that the graphics card offers very little in the way of settings other than some 'mipmap' and anti-aliasing sliders etc.