Well Im not sure which file you mean, but I tried the same test above as in post #12 using GWX 1.03 files instead & the problem is gone! I still get good texture & smoke but disappears after a short period & altogether when I dive, later when I surface only the scortched texture is there.

All I have to do now is nail it down to a the actual file causing it!

Edit: OK, it's the Submarine files, 1.03 run ok, 2.1 have the texture problem, knowing this has anyone any ideas as to the differences between the 2 versions?