CFS3 has always had an oil slick special effect.

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(The images above show the lighter, more transparent/iridescent oil textures provided with the all-in-one effects.xml that Daiwiletti and I put together recently)

Perhaps WOTR will have some additional refinements like oil that trails along in the wake of a wounded ship.

To me it looks like the original texture is still being used in WOTR, as it doesn't blend in very well and creates a discrete black/green blotch on the surface.

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I love the reflections in the new cockpit by the way...

Service To The Line,
On The Line,
On Time

US Army Ordnance Corps.