Mick Hazelgrove wrote in message <370f663b.0@news.povray.org>...
>Hi everybody
>
>As some of you will know I have been attempting to model rough water.
>
>I could not understand why I had no control of the textures until I tried
>adding some transparent cones for the spray - they showed...I eventually
>traced the problem to ior, turn the ior off in the water HF and the cones
>became transparent.
>
>The same applies to stacked hf, the ior in the water makes some of the
>higher hfs (I think the parts above the water surface)visible.
>
>Unfortunately turning off the ior changes the waves considerably
>
>Is this a variant of the double illumination bug? is there a fix?


I don't know if it is, but the double illumination bug effects only smooth
height fields (as opposed to non-smooth ones that is).  You could try
removing the smooth keyword (if present) and seeing if that effects
anything.  Otherwise, I doubt it's a double_illuminate problem...


Matt

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