[CapnScurvy]

That's great Tempest!! Changing the image file to whatever you like is the whole point.

What's important is to have a good image....that's as small as possible in size. The larger in size, the more game memory is used to reproduce the effect. I didn't even look to see what the .bmp memory size was (I just wanted to explain the process) but, in real modding you need to balance the need for change with the amount of memory that will be used to put the modification into effect.

One thing to look out for with a .dds image is the Mip Maps that may be produced needlessly in the image. Interior images do not need extra Mip Maps made since the need to see them at a distance just doesn't come into play. I'm suspecting the propellers are about the same. You'll not see them underwater except for being very close. So, not having the Mip Maps added to the image will conserve the overall size of the image, creating better game performance. Many modders have not followed this idea, and have had players wondering why their game has slowed to a crawl when a mod is activated.

Of course, object model's that are seen from a distance....like planes, ship parts above water, shore buildings etc.... will still need to have Mip Maps included.