December 12, 2011, 09:17:18 am
I'm a naval architect and I've been experimenting with waterfall material for a ship wake too. However it looks like the object that has the material applied needs to have a slope and then the foam will 'fall' faster and in the direction of gravity as expected for water flowing freely, with maximum speed at 90 degrees and almost zero if the object is horizontal . The foam motion display depends also on the fresnel angle and even when horizontal and when you move the camera up enough above the water, you can see the foam moving.
I've noticed another factor affecting the display of the flow/foam and it's the proximity of another object under it. If you place a surface very close under the wake, the foam shows up much more apparent.
Also I noticed that on an horizontal flat wake, the foam flows always from South to north (you can see the axes if you start the rotate command when the arrow shows up).
Then when you start to apply pitch-rotate, the foam starts to flow down the slope with faster speed as you incline more and more.
Taking all this in account, I think that it would be great to have an optionl in the material controls that allowed to manually decide the direction and speed of the foam (much like the ocean controls) so that when applied to the horizontal wake mesh, (hey, ships don't go uphill or downhill last time I checked
, one could still make it run accordingly to the heading and speed of the boat overriding the original waterfall material.
Still having a problem merging smoothly the wake object with the ocean surface, but this is a different subject.
Your comments would be appreciated !