Oh the dreaded hidden blurry water / smoke sphere. Post process.... Ha ha That's going to be difficult. There is lots of unexpected wierdness that happens in Vue's fake volumetric materials. There is a whole bunch of pictures here already posted of wierd artifacts. Like Blow your mind stuff green and blue colors that or not in the scene. If you must render it... Try this... Load that fountian that comes with vue. Check out the water. I used that once on a different project by changing that material to the milk one and getting rid of lots of the spheres. I also made the spray part the same idea with a terrain. The other thing to is it may have nothing to do with the boat texture it may be the material you used. Turn off shadows on it and few other channels that could transmit color onto a different object.